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Law enforcement officers will make an arrest in the next few days of someone who allegedly helped the Orlando gunman carry out the mass shooting inside Pthe ulse nightclub that killed 49 people this weekend, sources told Orlando’s WFTV-Channel 9 on Monday.

Gunman Omar Mateen, 29, opened fire at the Orlando nightclub early Sunday, leaving at least 49 people dead and 53 wounded before he was killed in a shootout with SWAT team members.

Mateen fired 202 rounds, that includes the gun battle between him and law enforcement officers, the source said.

Ray Marcano |