Damaged homes and cars are seen after a devastating tornado hit Joplin, Missouri May 24, 2011. [Photo/Agencies]

JOPLIN, Mo. - The massive tornado that tore through Joplin, Mo. is now officially the deadliest single twister in the US in nearly six decades with a death toll of at least 122.

City Manager Mark Rohr said Tuesday that more than 750 people were injured. Nine people also have been recovered from debris and authorities say the search and rescue is continuing.

The twister that hit Joplin on Sunday is the deadliest single tornado since the National Weather Service began keeping official records in 1950. It's the 8th-deadliest single twister in US history.