Iran 'Detains' Iraqi Coastguards

BBC News:

At least eight Iraqi coastguards have been detained by Iran after a clash on the Shatt al-Arab waterway, which marks the Iran-Iraq border, officials say.
Basra Governor Muhammad al-Waili said the Iranian Navy attacked them after they boarded a merchant ship believed to smuggling oil. Mr Waili said one Iraqi coastguard was killed and that the boats had been taken to the Iranian port of Abadan. READ MORE

The Shatt al-Arab has long been a source of tension.

Formed by the confluence of the Euphrates and Tigris rivers, the waterway is Iraq's main access to the Persian Gulf.

The exact line of the border in the Shatt Al-Arab is disputed, and was one of the causes of the Iran-Iraq War in the 1980s.

Iran detained eight British servicemen for three days in 2004 after they allegedly strayed over the maritime border.