Authorities are investigating what made more than 70 people attending a Passover event in Franconia, N.H., ill after eating at a potluck event.

State health officials said 150 people were attending the event when the illness broke out Saturday night, WMUR-TV of Manchester, N.H., reported Monday.

The New Hampshire Health and Human Services Public Health Lab was conducting tests to determine if the illness was salmonella, the report said.