Ankara - Four separate blasts near Turkey's popular coastal region and in the country's commercial capital, Istanbul, injured at least 22 people, the state news agency Anatolian reported on Monday.

Anatolian said three blasts occurred near the southern coastal area of Marmaris early on Monday and another in Istanbul late on Sunday.

The British Foreign office said 10 British tourists were among the wounded.

There were no immediate claims of responsibility and the authorities were not immediately available for comment.

Television pictures showed ambulances and police cars at the scene of the explosions.

Marmaris is a coastal resort popular with west European and Russian tourists as well as Turks.