FORMER US President Ronald Reagan feared aliens were planning to invade America

He is said to have believed they had been spying on Earth for decades.

Mr Reagan, who was President from 1981 to 1989, told a pal he had seen flying saucers three times, said author Darwin Porter.

He allegedly added: “I just know it. They’ve selected some desert in the West to make their landing.”

But the ex-President’s daughter Patti Davis dismissed the claims, saying her father, who died in 2004, may have been joking.

Former Soviet Union President Mikhail Gorbachev has claimed the US and USSR made a pact to help each other against an alien invasion.

He added: “President Reagan said to me, ‘If the US were attacked by someone from outer space, would you help?’”