The FBI has jumped into the investigation into the 32-year-old gunman who opened fire with an AK 47 in an IHOP in Carson City, Nevada Tuesday morning, killing four people and  himself.

The Tahoe Daily Tribune reports that more than a dozen FBI agents on Wednesday morning combed through the Mi Pueblo Meat Market in South Lake Tahoe, Calif., where gunman Eduardo Sencion, 32, worked as a cashier.

The paper reported that FBI agents removed several paper and plastic bags of property, as well as what appeared to be two computer towers.

The store was closed during the search, the paper reported. In fact, a sign on the door said the market would not open today.