Military pilots said F-15 crew member would be trying to hide for as long as possible from the Iranian military

US search and rescue efforts for the missing second crew member of the downed F-15E fighter jet continued into a second day as Iran came under heavy bombing and Israel extended the war in Lebanon.

A pilot had been rescued on Friday after the F-15E Strike Eagle became the first US plane to be downed over Iran during the five week long war, but the second of the two strong crew has not been accounted for.

Iranian media released pictures of a wreckage, including a distinctive F-15 tail fin, and a used ejector seat on Friday, with state media and businesses in the country offering a bounty if the missing crew member could be captured.

The US air force launched a massive search and rescue effort, using low flying Pave Hawk helicopters and specialist C-130 Hercules transport.