Saudi Arabia’s air defense system has intercepted two ballistic missiles over Riyadh.The missiles were fired by Houthi militia from across Yemen’s border, Arab News quoting state news channel al Ekhbariya TV reported.

Eye witnesses were quoted as saying they heard four consecutive booms in the Saudi capital, Riyadh. The Houthis have previously been accused of committing war crimes after targeting civilian areas.

On Wednesday the Houthi-affiliated website Al-Masirah said the missiles were intended to strike economic targets in Riyadh.

But a spokesman for the Saudi-led Arab coalition said hostile actions carried out by the Iran-backed Houthi militia proved the continued involvement of the Iranian regime in Yemen.