A key suspect in the Bangkok bombing has fled to Turkey, say police in Thailand.
Earlier on Monday, two men and a woman were detained in Malaysia in connection with last month's bomb blast which killed 20 and injured more than 120..
Thai Police have issued an arrest warrant for a 26-year-old Thai woman and a foreign man in connection with the deadly blast in Bangkok two weeks ago.
It comes after a raid on a suburban apartment block uncovered possible bomb-making materials, a force spokesman said.
Fertilizer, digital watches and an explosives detonator were found in the property in the Min Buri district, he added.
Twenty people, who were mostly tourists, were killed when a bomb tore through the crowded Erawan Shrine on August 17, injuring more than 100 others.
Police arrested a 28-year-old foreigner in a high-profile raid on Saturday at a building in nearby Nong Chok, where officers discovered explosives and piles of fake passports.
A Thai TV station apologises after dressing up a member of staff as the Bangkok bombing suspect and sending him to the scene of the blast.
Friends have paid tribute to a London law student who was killed in Monday's bomb blast in Bangkok.
Grieving family and friends of the victims of a devastating bomb attack in Bangkok have left flowers and messages at the site of the blast.