Indonesia ? A pair of powerful explosions at two luxury hotels killed nine and wounded at least 50 people in an upscale Jakarta neighborhood this morning, sending debris and glass flying onto the streets.

Anti-terror forces were at the scenes of both blasts, but did not yet want to speculate about the possibility of an attack by militants.

“There were bodies on the ground, one of them had no stomach,” said a man who lives near the hotels and who arrived at the Marriott before emergency services. “It was terrible.”

Alex Asmasubrata, who was jogging by the hotels, said he first heard a loud explosion at the Marriott. Five minutes later, a bomb followed at the Ritz.

The blasts were caused by “high explosives,” Security Minister Widodo Adi Sucipto told reporters at the scene, without elaborating. He said they exploded two minutes apart.

He said a New Zealander was among those killed, and that 13 other foreigners were among the injured.