The Latest: Bolt: Great field for women's 100 meter race

RIO DE JANEIRO (AP) The Latest on the 2016 Summer Olympics being held in Rio de Janeiro (all times local):

5:35 a.m.

Usain Bolt, no slouch himself on the track, says it's going to be hard to pick a favorite in the women's 100 meters at the Rio Olympics.

Olympic track and field events are starting Friday, including preliminary heats in the women's 100 meters.

Five sprinters at Rio have joined the small list of women to crack the 10.8-second mark: Elaine Thompson of Jamaica, Murielle Ahoure of the Ivory Coast and American teammates English Gardner, Tianna Bartoletta and Tori Bowie. Two-time defending Olympic champion Shelly-Ann Fraser-Pryce of the United States is also in the field.

On the men's side, preliminaries start in the 400 meter and 800 meter races. The man to beat in the 800 meters is David Rudisha of Kenya, who holds the world and Olympic records.

In the 400, Rio fans will get a first look at American LaShawn Merritt, South Africa's Wayde van Niekerk and Grenada's Kirani James.

5:10 a.m.

Winning a gold medal in soccer and not worrying about anything else is no longer good enough for Olympic host Brazil.

Brazilian officials say the country now wants to win as many events as it can and finish in the top 10 in the number of overall medals won – a goal some observers believe may be a tall order.

Adriana Bahar of the Brazilian Olympic Committee tells The Associated Press that ''of course, soccer is a passion in Brazil … but now we want to focus on the 41 other disciplines in the Olympics.''

Brazil has won three medals so far – one of each color. But the Rio de Janeiro Olympics have yet to catch on across the sprawling metropolitan area of 12 million. Stadiums for basketball and judo have been full but many other venues have been lightly attended. Golf appeared to have more rules officials than fans on its opening day.

4:55 a.m.

A Brazilian police officer has died after being shot in the head when he and two others working security at the Rio Olympics got lost near a slum and encountered gunfire.

Justice Minister Alexandre de Moraes announced Helio Vieira's death early Friday on his official Facebook page.

The officers from Brazil's national security force were using a GPS device to navigate unfamiliar streets Wednesday afternoon when they took a wrong turn off a highway leading to Rio's international airport. Their truck was sprayed with bullets, shattering the windows.

Viera died late Thursday and the other officers suffered minor injuries.

More than 85,000 security forces have been deployed in Rio for the Olympics, which is double the number of London in 2012.

4:45 a.m.

Several swimmers have been listed with the wrong qualifying times coming into the Rio Olympics – raising even more questions about the way world swimming body FINA is governing the sport.

FINA did correct some mistakes, including that of a Kuwaiti swimmer competing under the IOC flag.

The Guardian newspaper in Britain reported that 17 swimmers from 16 countries still had qualifying times that didn't match their actual results from last year's world championships. All were admitted to the games under the ''universality rule,'' which aims to spread the sport to developing countries that would not otherwise have qualified.

In a statement Friday, FINA said the Olympic competition in Rio was not affected by the wrong times.

FINA did change the qualifying times for several dozen swimmers, as well as some relay times for major teams such as Italy and Hungary. The times determine heats and lane assignments during preliminary heats.

4:20 a.m.

Fiji has its first-ever Olympic medal – and it's gold to boot. Now that's a reason to party.

The Pacific Island nation erupted with joy Friday after its rugby sevens team crushed Britain 43-7 in final in Rio de Janeiro.

In the capital of Suva, fans packed the 15,000-seat National Stadium to watch the Olympic final on a big screen – held Thursday night in Rio but at 10 a.m. Friday back home. Tense at first as they saw their nation on the brink of an historic achievement, fans relaxed and then rejoiced as Fiji ran away with the victory.

Prime Minister Frank Bainimarama, in Rio for the games, told reporters ''rugby has always lifted the spirit and always brought us together. Right now, whatever political party, there's no difference. Everyone is coming together to celebrate.''

He declared a public holiday for Aug. 22, the day after the team returns home.

3:35 a.m.

Chinese officials say a female Chinese swimmer has tested positive for a banned substance at the Rio Olympics – the first competitor in the sport to fail a test at the games.

The Chinese Swimming Association says 18-year-old Chen Xinyi has tested positive for the diuretic hydrochlorothiazide after she finished fourth in the women's 100-meter butterfly Sunday, missing a bronze medal by nine-hundredths of a second. Xinhua, China's official state news agency, reported the story Friday.

Chen was also scheduled to compete Friday in the 50 meter freestyle.

Chen has applied to the International Olympic Committee to have her B sample tested and to get a hearing on the matter, Xinhua said, citing the swimming association, which promised in a statement to ''take this matter seriously.''