Bombs ripped through a railway station and a hotel and derailed a train, killing four people and wounding dozens more in southern Thailand today, police said.
There was no immediate indication who was responsible for the blasts, which took place in an area where Muslim separatists are believed to have set off similar bombs in the 1990s.
One bomb exploded in the railway station of southern Thailand's largest town, Had Yai, on Saturday afternoon, killing a seven-year-old boy and injuring 35 people, two seriously, police said.
Several hours later, another bomb ripped through a hotel in the southern Thai province of Yala, killing three people and injuring two others. A Malaysian citizen was among the dead, police said.
In a third explosion, a train was derailed in the southern province of Songkhla, slightly injuring seven people.
Local television said the bomb had been planted next to the railway line near a gas storage tank. Four carriages were derailed.
Thai radio said Prime Minister Thaksin Shinawatra would visit the injured and inspect the station at Had Yai tomorrow.
In the early 1990s, a wave of bomb attacks targeted railway tracks and stations in Thailand's five southern provinces.