Authorities say a mother and baby were rescued after witnesses reported seeing her throw the 1-year-old boy into an eastern Pennsylvania river and then jump from a bridge.

WFMZ-TV (http://bit.ly/1JKhIA7 ) reported that the episode happened Sunday afternoon at the Hamilton Street Bridge over the Lehigh River in Allentown.

Capt. William Reinik said officers found the baby about 700 yards downstream and performed CPR. He said the baby and 19-year-old mother are in serious condition but expected to survive.

Reinik said police are investigating the case as an apparent attempted murder-suicide, but the investigation continues and no charges have been filed.

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Information from: WFMZ-TV, http://www.wfmz.com