A small planed loaded with bundles of cocaine and likely battling stormy weather crashed into Lake Heron in Rio Arriba County on Sunday morning, apparently killing all on board, according to the New Mexico State Police.

State Police Lt. Eric Garcia said it was not known how many people were on the aircraft, but there were no signs that anybody had survived the crash.

Access to that section of the 4-mile-long lake, near Tierra Amarilla, was closed after bundles of what turned out to be cocaine began floating to the surface, Garcia said.

"Several packages began surfacing," he said.

He said state police responded with boat and diver teams after fishermen on the lake reported seeing the plane dive into the lake about 11 a.m.

However, state police called off the search after sunset Sunday night, and the plane had not been found.

The plane was fully submerged, Garcia said.

A National Weather Service spokesman said there were gusty winds and thunderstorms in the area at the time of the crash.

The Federal Aviation Administration regional office in Fort Worth, Texas, also was investigating the crash but had no further information.

Heron Lake State Park is located on the reservoir's southern shore.