A key in the door of a Yonkers apartment led police to a stash of marijuana and a shotgun, police said.

David Michaels, 30, was spotted by police selling two plastic bags of crack cocaine to another man about 7 p.m. Tuesday on the street near his building at 137 Lake Ave., authorities said.

After the sale, Michaels went into the building, followed by Yonkers police.

As Michaels opened his apartment door, Yonkers police stopped him and placed him in handcuffs for the alleged drug sale, police said. He was carrying 19 plastic bags of crack cocaine, police said.

With the apartment door open, police spotted the pistol grip of a shotgun sticking out of a bag on the floor, authorities said. Police obtained a search warrant and members of the police Crime Scene Unit entered Michaels' apartment.

Police found a Mossberg shotgun with 12 shells and nine resealable plastic bags filled with marijuana, authorities said.

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Michaels was charged with third-degree criminal possession of a controlled substance, fifth-degree criminal possession of a controlled substance, and third-degree criminal possession of a weapon, all felonies. He faces up to 25 years in prison if convicted. He was taken to the city jail and is awaiting arraignment.

Police said they are searching for the man who purchased the drugs from Michaels.