
Saturday's bomb attacks were coordinated across three provinces and included the fire at the Lee Gardens Plaza Hotel in Hat Yai, national police chief Priewpan Damapong said.
Police had initially reported that the fire that killed three people at the hotel was caused by a gas pipe explosion.
But Priewpan confirmed on Sunday that it was because of a car bomb in the underground parking lot, the government news service reported.
Police revised that death toll down to three, from four, at the hotel in Hat Yai, about 930 kilometres south of Bangkok. The victims included one Malaysian tourist.
The death toll from three bombs detonated in Yala town stood at 11 Sunday, with 10 of the wounded in serious condition, the government news service reported.
Three bombs exploded just minutes apart on Saturday afternoon in different parts of Yala's central business district, Army Colonel Parinya Chaydilok said.
In a separate attack Saturday in neighbouring Pattani province, a police officer was wounded by a bomb, officials said.//DPA