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..
Police in Thailand have arrested a man in connection with a bombing in Bangkok that killed 20 people on August 17.
Police raided an apartment used in northern Bangkok and also discovered possible bomb-making materials, according to a national police spokesman.
Prawut Thavornsiri said the suspect "looks like the one we are looking for".
"They also found a lot of materials which can be used to make bombs", he added.
The bomb tore through the city's crowded Erawan Shrine in Bangkok's commercial heart and most of the victims were tourists.
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.