About 1,500 feet of shoreline near Seabrook has been closed to the harvest of razor clams because of a sewage spill.

An alert from the state Department of Health came in Friday afternoon, saying the section of beach, just south of Pacific Beach, will remain closed for the remainder of February.

“We urge razor clam harvesters to avoid this stretch of beach, as shellfish can retain harmful bacteria and viruses found in sewage,” said Mark Toy, environmental engineer with the state Office of Environmental Health and Safety.

“We advise anyone who harvested in this area on Thursday to throw away any remaining clams.”