“Islamist militants in Indonesia may be considering attacks on soft targets and Westerners when U.S. President Barack Obama visits this month, the head of counter-terrorism said on Thursday.

Obama is due to visit Indonesia, his childhood home, between June 15 and 17 after delaying a trip originally scheduled for March.

‘We haven’t got any detail of a specific plot to target Obama,’ Tito Karnavian, the head of Indonesia’s counter-terrorism unit, told foreign reporters.

“Since a deadly bombing attack on hotels in Jakarta last year, Indonesian security forces have tracked down the militants responsible and prevented other attacks.

They also killed Noordin Top, the leader of the group that carried out the attack on the Marriott and Ritz-Carlton hotels. And they hunted down and killed a man known as Dulmantin, who had long been on Indonesia’s most-wanted list, suspected of being involved in a 2002 attack on the island of Bali.

“Several people, including one American, were wounded Sunday when a convoy belonging to a U.S. mining company came under fire in the province of Papua, police said.

The convoy of two buses and four cars was carrying employees of PT Freeport, the largest copper and gold mining company in the country’s eastern-most province.