It was not immediately clear what caused the blast in Antalya's harbour area around 1400 (1100 GMT), the Anatolia news agency said.

A local police chief was quoted as saying two suspects had been detained.

Antalya, Turkey's largest resort, is popular with German, British and other European tourists.

Police said both teenage victims were Turkish, according to the AFP agency.

Series of attacks

Assistant police chief Mujdat Ozcan said: "It is not known what caused the explosion, whether there is a terrorist dimension."

Turkey has suffered a series of bomb attacks in recent months.

Blame for the attacks has been variously attributed to, or claimed by, Islamist radical groups, Kurdish separatists and left-wing militants.

A Turk and an Iranian were killed in simultaneous bomb attacks on two hotels in Istanbul earlier this month, which also injured 11 people.

In November 2003, more than 60 people were killed in al-Qaeda-linked attacks on two synagogues, the British consulate and London-based HSBC bank in November 2003.

But in Antalya, a local reporter, who asked not to be named, said police were also investigating whether the blast may have been caused by explosives on a fishing boat.

Turkish fishermen sometimes use dynamite in the course of their work.