Police in Bahrain say this was the spot where a 17-year-old died when a bomb he was planting went off in his hands.
The intended target of the attack wasn't clear.
Witnesses said a worker at a nearby warehouse was wounded by the blast.
Holes were visible in the walls of the pre-fabricated home used by the workers as a sleeping area.
Bahrain's state news agency said a gun and ammunition were found near the body of the bomber said to have been wanted by security forces for criminal offences.
The incident happened in the village of Bani Jamra, west of the capital, Manama.
Sunni-ruled Bahrain has largely put down an uprising by mostly Shi'ite protesters demanding reform.
But small-scale clashes have continued and bomb attacks have been on the rise since the middle of last year.