Swarms of 'crazy' ants invade homes, wrecking computers

In what sounds like a low-budget horror film, voracious swarming ants are invading Texas homes, short-circuiting fuse boxes and wrecking computers.

They have ruined pumps at sewage pumping stations, fouled computers and gas meters, and caused fire alarms to malfunction.

Worryingly, the ants have now been spotted at Nasa's Johnson Space Centre and close to one of Houston's airports.