Suspected Muslim fighters have killed four people and injured two in Thailand's troubled south.
The latest attacks follow a visit to the south on Saturday by Surayud Chulanont, Thailand's prime minister.
A 33-year-old Muslim man was killed in a drive-by shooting late on Sunday as he rode a motorcycle home in Yala, one of three Muslim-majority provinces bordering Malaysia, police said.
Also on Sunday, in neighbouring Pattani province, a 46-year-old Buddhist man was killed in a drive-by shooting.
A Buddhist couple in their 40s were killed after their house in Songkhla province was fired upon.
Two other Buddhists were seriously injured in the attack.
Surayud's government has resolved to end the bloody uprising ravaging the provinces of Yala, Pattani, Songkhla and Narathiwat, and upon his appointment as prime minister, he offered an apology to local Muslims for past government wrongdoing.
But his visit to the region on Saturday – in which he reiterated his commitment to forging a peaceful solution to the unrest – coincided with the ambushing of police patrols and torching of a government school by the suspected fighters.
More than 1,800 people have been killed in three years of unrest in the southern provinces.
Thailand's government has periodically accused Malaysia of harbouring Thai fighters in the northern states which border Thailand, a charge the Malaysian government has denied.