The main Gulf market indices witnessed strong declines at the beginning of Sunday's trading, following the Iranian attack on Israel on Saturday night, which raised fears of an expansion of the war in the region.

The Saudi Stock Exchange (TASI) index fell by about 1.8 percent to 12,557 points, while the Qatari main index fell by 1.3 percent, the Kuwaiti main index fell by 0.79 percent, and the Muscat Stock Exchange index fell by 0.19 percent.

In contrast, the Tel Aviv Stock Exchange index rose by about 0.3 percent at the opening of today's session.

Iran fired explosive drones and missiles at Israel late Saturday in its first direct attack on Israel.

Tehran's attack on Israel came in response to an airstrike believed to have been carried out by Israel on its embassy compound in Damascus on April 1 that killed Revolutionary Guard officials. The Iranian attack has heightened fears of a wider regional conflict.