A Tucson woman was arrested at the Nogales port of entry Thursday after she was found carrying heroin, immigration officials said.

The 21-year-old woman was referred for further inspection when a drug-sniffing dog alerted officers at the Morley pedestrian gate on June 22, according to a U.S. Customs and Border Protection news release.

Officers searched the woman and found almost eight pounds of heroin taped to her chest and stomach areas, officials said.

The heroin was valued at more than $135,000.

In another incident, a 40-year-old Nogales, Arizona man was referred to a secondary inspection of his GMC truck at the Dennis DeConcini crossing, said officials.

A drug-sniffing dog alerted to the truck's spare tire, which was cut open, exposing multiple packages of more than 60 pounds of cocaine. The cocaine had a value of more than $694,000, said authorities.

Officers seized the drugs and vehicle and turned over the woman and man to federal authorities.

Contact reporter Carmen Duarte at cduarte@tucson.com or 573-4104. On Twitter: @cduartestar