BAGHDAD (Reuters) - Two Katyusha rockets landed near the US embassy in Baghdad's Green Zone on Monday night, Iraqi security sources said.

The security sources added from inside the Green Zone that "Katyusha rocket landed near the US embassy, ​​and another landed inside it three meters from the southwest gate."

A third rocket landed in the Tigris River surrounding the heavily fortified area and has recently opened its streets, except for roads leading to the US embassy.

The news agency AFP quoted Iraqi police sources, who asked not to be identified, that the location of the rocket launch, a region of Hawr Rajab, which lies south of Baghdad, and includes several factions loyal to Iran.

Western sources inside the Green Zone said that sirens were heard from within the US Embassy twice in a row, but the Iraqi Security Information Center announced in a statement that "two mortar shells" in the vicinity of the Green Zone, without reference to the US embassy.

The attack comes amid heightened tension between the United States and Iran. No one has yet claimed responsibility for the attack.

The last such attack dates back to May 19, when a Katyusha rocket landed in the Green Zone, days after Washington withdrew its non-essential staff and diplomats from Iraq.