TECATE, Calif. -- More than 2 tons of alleged marijuana was seized by U.S. Border Patrol agents who stopped four SUVs near the Mexican border, and one driver was arrested, but the three others got away, the Boarder Patrol reported Saturday.

A Border Patrol agent working near Tecate spotted the dust-covered SUVs driving as part of a caravan on State Road 94, heading west toward San Diego, shortly before 8:30 a.m. Thursday.

Authorities said the suspects forced open a gate near the international border and drove to the highway, which skirts the border.

Agents stopped the last vehicle in the convoy, and after finding numerous bundles of alleged marijuana inside, arrested the driver, an unidentified Mexican national who was turned over to the anti-drug task force Operation Alliance, officials said.

The driver of a second vehicle stopped at a trailer park near Barret Lake, got out and fled, said officials.

The two other SUV drivers made an abrupt U-turn near Dulzura and headed back to the Tecate Port of Entry, officials said.

When they reached Tecate the drivers split up, with one heading west along the border fence and the other driving east.

Both drivers got out of their vehicles and jumped over the fence back into Mexico, officials said.

Agents seized a total of 4,042 pounds of suspected pot inside the vehicles, which the Border Patrol valued at $3 million.