Three Bangkok garbage collectors were injured yesterday - one seriously - when two abandoned "ping pong" bombs exploded.
Two of four home-made bombs left in a plastic bag outside a house in Sukhumvit Soi 101/1 in Bang Na district exploded.
Police said the incident was not aimed at causing confusion, as the bombs were likely to have been abandoned by some youngsters before passing a security checkpoint nearby.
One of the injured garbage collectors, Surach Sithipanya, 21, had fingers on his right hand badly damaged by the blasts. He was taken to hospital, where a doctor was treating his middle and ring fingers, his boss, Bang Na district chief Wanlaya Wattanarat, said yesterday.
"He said he collected a garbage bag from outside a house. The explosions occurred while he was sorting out the garbage in the bag," she said.
Two other garbage collectors injured in the incident were Amporn Saebay, 47, who had cuts on his left leg, and Koon Jiangchai, 45, who suffered from ringing in the ear, according to the district chief.
Police later searched a house near where the bombs were collected. They found an unregistered pistol, a sword and a cudgel, but there no other objects were found that would link the place to the home-made bombs, police said.
The injured worker Amporn said there were four or five plastic balls inside the bag wrapped with black tape. Surach was removing the tape when the explosions occurred, he said.
National police chief Pol General Somyot Poompanmoung said the bombs might have been abandoned by young troublemakers who planned to use them against their enemies, but had to dump them because of a police checkpoint nearby.
Metropolitan Police deputy commissioner Pol Maj-General Nipon Charoenphol said police would examine CCTV recordings in the area and ask local residents who might have seen someone leaving the bombs there.
Pol Maj-General Chavalit Prasopsilp, chief of Metropolitan Police Division 5, said police were confident the incident was not aimed at causing confusion.