A not-guilty plea was entered today on behalf of an Andover man charged with cocaine trafficking and gun possession after police allegedly found him with 48 kilograms of cocaine in his car last week, prosecutors said.

Jose Martinez, 52, was arraigned on a charge of trafficking more than 200 grams of cocaine and two counts of possessing a gun without a license, prosecutors said.

Martinez was ordered held on $5 million cash bail after his appearance in Lawrence District Court today, a statement from Essex District Attorney Jonathan Blodgett’s office said.

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Authorities had been investigating Martinez for three months prior to his arrest in Tewksbury Friday, when State Police troopers stopped him with the cocaine in his car, which had an estimated street value of $3.6 million, the statement said. Forty-eight kilograms is the equivalent of about 106 pounds.

After arresting Martinez, investigators searched his home, where they found two guns, ammunition, a digital money counter, and other evidence, the statement said.

Martinez will return to court May 6 for a probable cause hearing.