The Hockey World Cup has begun in the Indian capital New Delhi with a match between India and Pakistan the highlight of the opening day.
The ABC reports the tournament is seen as a trial run of security arrangements for the Commonwealth Games in October.
Security is described as unprecedented after a Pakistani terrorist group warned international athletes to stay away from the event.
Thousands of security personnel in the city are on alert for attacks.
The match was played under lights on Sunday night at the tournament's main venue, Dyand Chand Stadium in New Delhi. India won 4-1.
Authorities say more than 2000 police and soldiers are guarding the stadium.
Thousands of other police and soldiers are protecting key points throughout the city.