BROOKLYN - A 55-year-old man is dead and another is in police custody after a car crash on the Belt Parkway. 

It happened on the eastbound side near Pennsylvania Avenue Thursday morning. 

Authorities say a 40-year-old man was driving a Mercedes when he hit the victim's SUV from behind, causing it to overturn. The driver possibly hit other cars as well. 

Cops are now awaiting results to determine if that driver was under the influence of alcohol or narcotics.