BANGKOK — Up to 75 percent of the security cameras were broken along the getaway path taken by the main suspect in last week’s deadly Bangkok bombing, Thailand’s police chief said Monday, revealing a major obstacle to an investigation that has only fuzzy images of the still-unidentified man.
Investigators are trying to ‘‘put pieces of the puzzle together’’ but have had to use their imagination to fill holes left by cameras that failed to record his movements, said national police Chief Somyot Poompanmoung, openly frustrated as he spoke to reporters one week after the blast.
‘‘For example, the perpetrator was driving away — escaping — and there are CCTV cameras following him. Sometimes there were 20 cameras on the street but only five worked,’’ Somyot said. ‘‘Fifteen were broken, for whatever reason. They didn’t work.’’
Another challenge is that investigators lack sophisticated equipment such as that used to render blurry video clear, he said.