U.S. Border Patrol agents seized more than 1,700 pounds of marijuana in two incidents late Tuesday and early Wednesday and arrested two convicted sex offenders in the last week.

Early Wednesday, an agent working near Federal Route 20 northwest of Sells on the Tohono O’odham Reservation spotted a Chevrolet Avalanche traveling on a dirt road commonly used by smugglers, according to an agency press release.

The agent waited until additional agents arrived before inspecting the truck. They found 99 bundles of marijuana weighing 1,130 pounds inside.

The second major seizure occurred Tuesday night about one mile north of the border east of Douglas, the release said.

Agents saw a Dodge Ram truck cross the border and head toward town. They put down a spike strip and deflated the four tires, bringing the truck to a halt.

Agents saw two people get out of the truck and head to Mexico. They found 590 pounds of marijuana inside, the release said. The truck had been reported stolen out of Phoenix.

The 1,720 pounds of marijuana have an estimated value of $989,000, according to figures from the National Drug Intelligence Center.

The two convicted sex offenders were apprehended in separate incidents within the last week.

Domingo Marquez-Perez of Mexico was arrested last Friday in Douglas. A fingerprint check revealed Marquez-Perez had been arrested in North Carolina in 2005 for statutory rape and indecent liberties with a child, the release said. He pleaded guilty and was sentenced to one year and eight months.

On Tuesday, agents arrested Juan Santana, of Michoacan, Mexico, near Willcox. Records checks revealed he had been convicted in Michigan for criminal sexual conduct with force or coercion and sentenced to 205 days in jail, the release said.

He also had convictions for carrying concealed weapons and assault with dangerous weapons.

Both men are being held for criminal prosecution and formal deportation.