Rockets launched from Iraq town toward US base in Syria, Iraqi security sources say

First attack on US forces since early February comes day after Iraq's prime minister returns from US visit

At least five rockets were launched from Iraq's town of Zummar towards a US military base in north-eastern Syria on Sunday, two Iraqi security sources told Reuters.

The attack against US forces is the first since early February, when Iranian-backed groups in Iraq stopped their attacks against US troops.