Two suspects were being held on $21,500 bail after a police dog alerted officers to drugs in their vehicle, Big Island police said.

Authorities arrested and charged Jovina Lagret, 24, of Kawaihae, and Patrick Medeiros Jr. 30, of Kapaau, with drug and firearms offenses Thursday after a traffic stop in Kohala, police said.

Vice officers had been looking for Lagaret in connection with a drug investigation when she was seen driving a sports utility vehicle with Medeiros on Kohala Mountain Road Thursday morning, police said.

A narcotics detection dog detected drugs in the SUV and police obtained a search warrant and discovered numerous packets of crystal methamphetamine with a street value of $1,800, a digital scale, Valium tablets, $140 in cash, and rifle ammunition, police said yesterday.

Prosecutors charged both suspects with one count each of  promoting a dangerous drug, meth trafficking, promoting a harmful drug, place to keep ammunition and two counts of drug paraphernalia.