NEW YORK -- CBS News has learned about a potential terror threat for the day before the election.

Sources say U.S. intelligence has alerted joint terrorism task forces that al-Qeada could be planning attacks in three states for Monday.

It is believed New York, Texas and Virginia are all possible targets, though no specific locations are mentioned.

The sources stress the credibility of the intelligence hasn't been confirmed, but the counterterrorism officials were alerted to the threat out of abundance of caution.