A door left open Thursday at a crematorium in the South Bay while the facility was in use, sending smoke with possible human remains up in the air.

When firefighters responded to the Cortez Family Crematorium on the 100 block of West 35th Street around 12:15 p.m., a large amount of smoke was coming from the chimney, National City Fire Battalion Chief Mark Beveridge said.

The crematorium had already put a body inside the oven, turned on the furnace but