A 25-mile stretch of Long Island shoreline was reopened to swimmers Thursday when health inspectors collected no more of the blood vials, syringes and other hospital waste that washed ashore a day earlier.

There was still no word on where the waste came from that prompted the one-day ban on swimming along the shore, which includes two popular state parks. Technicians were analyzing the debris collected Wednesday to try to determine its source.

Meanwhile in New Jersey, officials said that five of the 104 blood-filled vials that washed up on its shores last weekend contained AIDS-contaminated blood.