Hong Kong's Immigration Department reported that three residents were among the injured. Bangkok on edge after violent blast It's too early to say who orchestrated the attack, Somyot said there had been warnings about possible attacks, if not exactly when or where they might occur. Suspicious items turn out to be garbage bags The device that exploded was a pipe bomb wrapped in white cloth, Somyot said, according to the state news agency. Police earlier described it as a 3-kilogram "improvised device." The Thai police chief told reporters the bomb came from a motorcycle, though the Bangkok Post reported it was fastened to a utility pole. Police have not officially stated whether they believe the bomb had a specific target. Whatever its intentions, the damage was undeniable. Steve Herman, a correspondent and bureau chief for Voice of America, said he thought it was thunder when the explosion first went off. He saw six bodies under sheets inside the shrine and one outside of it, Herman said. Another reporter, The New York Times' Thomas Fuller, said body parts were scattered around the area. He estimated that several hundred military and police officials, some of them using dogs, were scouring the scene for more bombs. Police initially sealed off the scene near the popular Erawan Shrine because, they said at the time, a second bomb in the area remained active and needed to be defused. Bomb squad members in blast suits responded, and an officer announced over a loudspeaker, "The situation is still not safe. Please all stay back. There might be another bomb in the area."