The New York Mercantile Exchange in Manhattan is back in business after a bomb scare this morning. A Nymex representative said that about 10 a.m. EDT the exchange was evacuated because of a bomb threat. The building was cleared for about 45 minutes while law enforcement officials checked out the area.

Trading was halted on certain contracts and the opening was delayed on others, but the exchange is again functioning fully, the representative said. Most of the affected futures were Nymex division contracts, he said.

The exchange will close at its normal time.