ALAMEDA (CBS SF) — A man died in police custody Monday morning, prompting investigations, according to Alameda police.

Officers responded Monday morning at 10:45 a.m. to reports of a man who appeared intoxicated and a suspected theft.

READ MORE: Looming La Niña May Push Western Drought From Bad to Worse

According to police, when officers found the suspect in the 800 block of Oak Street and attempted to detain him an altercation ensued. Officers said there was a struggle to get the man to put his arms behind his back and the man suffered a medical emergency.

READ MORE: Update: Fawn Fire Near Redding Grows To 7,500 Acres Overnight; Firefighters Look To Cooler Weather

Police said officers immediately began to administer lifesaving measures. The Alameda Fire Department transported the man to a local area hospital, where he later died.

Authorities have identified the man as 26-year-old Mario Arenales Gonzalez of Oakland. The cause of his death is unknown.

MORE NEWS: Air Quality Advisory Extended Through Monday Due To Wildfire Smoke

So far, the Alameda County District Attorney’s Office is investigating the incident and the Alameda Police Department has requested that the Alameda County Sheriff’s Office conduct its own independent investigation.