Citizen Weapon Inspectors at Prestwick
"A spokesman for campaign group Trident Ploughshares told BBC Scotland three people had managed to get onto a US cargo flight. He said they were searching for evidence to suggest the plane was carrying bombs to Israel.
On Sunday, four people were arrested after demonstrators broke through security fencing onto the main runway.
It was reported last week that US military flights carrying bombs to Israel would no longer use any civilian airports in the UK for refuelling.
The protesters describe themselves as "citizen weapons inspectors" and said they were searching for evidence to suggest the plane was en route to Israel carrying bunker busting bombs.
Strathclyde Police said a number of people had been arrested at the airport on Monday morning. "