The US State Department has offered a reward of up to $5 million for an alleged bomb-maker Abu Ibrahim, whose real name is Husayn Muhammed al-Umari.

The approximately 73-year-old Abu Ibrahim is wanted by the FBI for his alleged participation in the August 11, 1982 bombing of Pan American World Airways flight 830, which claimed the life of a 16-year-old boy and left more than a dozen passengers wounded as the plane headed to Honolulu from Tokyo.

The FBI recently stepped up its efforts to catch Abu Ibrahim after decades by releasing an age-enhanced sketch of him earlier this year.

The previous reward for information leading to his arrest was $200,000.

According to former law enforcement officials, the FBI might finally nab Abu Ibrahim with the new reward.

"If he is still out there and functioning ... we got a good chance now. Better than we had before. Money talks," Denny Kline, a retired FBI explosives expert said on Tuesday.

The FBI has put Abu Ibrahim on its list of most-wanted terrorists, a group that includes Osama bin Laden and al-Qaeda's No. 2 leader, Ayman al-Zawahiri.

HRF/AKM