RIYADH — The main suspect in the 1996 bombing of the Khobar Towers residence at a U.S. military base in Saudi Arabia has been captured after nearly 20 years on the run, a Saudi-owned newspaper reported on Wednesday.

Asharq al-Awsat said Ahmed al-Mughassil, leader of the Hezbollah al-Hejaz who had been indicted by a U.S. court for the attack that killed 19 U.S. service personnel and wounded almost 500 people, had been captured in the Lebanese capital Beirut and transferred to Riyadh.

Saudi authorities said they were looking into the report, but did not provide further information.

A Lebanese security source said that Mughassil, a Saudi national, had been detained in Lebanon and transferred to Saudi Arabia around two weeks ago and that he was considered by Riyadh as the top suspect in the case.

The militant group Hezbollah Al-Hejaz confirmed Mughassil was stopped by security officials at Beirut airport on Aug. 7 and blamed the Saudi government and the Lebanese political party led by former PM Saad Hariri.

“We hold the Saudi regime and (Hariri’s) Future bloc responsibility for this treacherous action and we assert the inevitability of the safety of the leader,” the group said in a statement.

Saudi Arabia and the United States have accused Iran of orchestrating the truck-bomb attack. Iran has denied any responsibility for the attack.

In 2006, a U.S. federal judge ordered Iran to pay $254 million to the families of 17 U.S. service personnel killed in the attack.

The 209-page ruling had found that the truck bomb involved in the attack was assembled at a base in Lebanon’s Bekaa Valley operated by Lebanon’s Hezbollah and the Iranian Revolutionary Guards and the attack was approved by Iran’s Supreme Leader Ayatollah Ali Khamenei.