California ? NASA on Friday enlisted the help of a space probe orbiting Mars to search for another spacecraft missing around the Red Planet.

The Mars Global Surveyor lost touch with Earth for two days earlier this month. Last week, engineers received a weak signal with no data. Since then, the spacecraft has not confirmed receiving a command to point one of its transmitters to Earth.

On Friday, the space agency directed another probe, the Mars Reconnaissance Orbiter, to use its cameras to scan the area where the Global Surveyor might be.

Scientists will not know until early next week whether the Reconnaissance Orbiter located the missing probe, said Veronica McGregor, spokeswoman for NASA’s Jet Propulsion Laboratory, which manages both spacecraft.