The Indian cricket team wore military camouflage caps in their third ODI against Australia in Ranchi on Friday to pay tribute to 40 paramilitary troops killed in a suicide bomb attack in Kashmir last month.
Virat Kohli's team will also donate their $8,500 match fees from the game to a fund for the families of those killed in last month's attack.
Former captain MS Dhoni handed out the caps -- which bore the logo of the Board of Control for Cricket in India -- to his teammates in a simple ceremony before the game.
"This is a special cap, it's a tribute to the armed forces," said Kohli, who urged others to support the families.
According to ESPNcricinfo, the BCCI had approached the ICC before going ahead with the plan, and the ICC confirmed there was no breach of match regulations. "We discussed with the BCCI as they requested permission, it is as part of a charity fundraising effort," an ICC spokesperson explained.