SANAA, May 7 (Xinhua) -- A powerful airstrike by Saudi-led coalition hit the headquarters of presidential office in the Yemeni capital Sanaa on Monday, targeting a secret meeting of Iranian-allied Shiite Houthi leaders and killing at least six, security sources at the scene told Xinhua.

"Top leaders, including President of Houthi Supreme Political Council Mahdi al-Mashat and Chief of Houthi Supreme Revolutionary Committee Mohammed Ali al-Houthi were believed to be at the meeting in the targeted president's office," a security source said on condition of anonymity.

He said six people were confirmed dead and up to 30 others were wounded.