MIDDLETOWN, N.J. (CBSNewYork) — New Jersey Gov. Phil Murphy provided an update Friday on the cluster of coronavirus cases linked to a house party in Monmouth County.

The governor says at least 31 teenagers have now tested positive in Middletown.

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Not all of the infections happened at the house party on July 11, however.

On Thursday, Middletown confirmed 20 new cases among teens ranging from 15-19.

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The governor says more of them are now cooperating with contact tracers after some initially refused to provide information.