Bangkok bomb: Thai police find and defuse device a week after Erawan Shrine blast killed 20

The 'wide bomb' was discovered in the house of a construction worker

Investigators could not confirm whether the bomb was linked to the attack on the city's Erawan Shrine (EPA)

Thai police have found and defused a bomb in a home on one of Bangkok’s busiest roads.

The bomb, referred to as a “wide bomb”, was found in the house of a construction worker on Sukhumvit 81, Kamthorn Aucharoen, who commands the police’s explosives ordnance team, told Reuters.

He said: “It was left in the house of a construction worker. We have deactivated the bomb and will destroy it.”

Investigators could not confirm whether the bomb was linked to an attack at a Hindu shrine last week, which killed 20 people and wounded 100 others.

Police told reporters that the trail had gone cold after CCTV images showed the suspected perpetrator leaving the scene in the back of a 'tuk-tuk' taxi.

"In terms of the CCTV cameras, some don't capture images properly and some were damaged which is a waste of time for police piecing together where the suspect went," national police chief Somyot Poompanmuang told reporters.

"We don't know if the suspect is still in Thailand but I have to assume he still is because we've got no information that he left."