Turkish police say they are hunting two suspects over an explosion in the resort town of Antalya that left three dead and hurt at least 20 on Monday.

The blast came hours after at least 27 people were hurt when bombs exploded in Istanbul and the resort of Marmaris.

A Kurdish militant group linked to the banned PKK party has said it carried out all three attacks.

Security has been tightened on Turkey's Mediterranean and Aegean coasts as police hunt the attacks' perpetrators.

On Monday night, police revealed they had arrested a man in Izmir accused of being involved in a failed plot to bomb the western coastal town.

The Turkish state news agency said the man was from the Kurdistan Workers Party (PKK) separatist group.

It said other people were also detained for helping the suspect and that plastic explosives were seized in the operation.

The Turkish economy is heavily reliant on tourism, which Kurdish separatists have repeatedly threatened to target.