Two men were killed Monday afternoon and early Tuesday morning in separate crashes, New Orleans police said.

The first accident happened about 4 p.m. Monday on Interstate 10 east near the Airline Highway exit, killing the 70-year-old driver of one vehicle.

The man, whose identity was not immediately available, made an “erratic” exit off the interstate and slammed his Lexus sport-utility vehicle into the back of a Toyota before colliding with a concrete barrier, said officer Frank Robertson, a Police Department spokesman.

Witnesses told police the SUV was speeding.

The SUV’s driver was pronounced dead on the scene. His 67-year-old passenger was brought to a hospital, where she was in critical condition, Robertson said.

The driver of the Toyota was not seriously injured.

Fatality investigator Melvin Hunter is in charge of the investigation.

Early Tuesday an unidentified man died when he drove his car into another car in the Bywater neighborhood, police said.

The accident happened about 12:50 a.m. at St. Claude and Poland avenues.

A 28-year-old man was driving a Ford Taurus north on Poland and an unknown man was driving a Chrysler 300 west on St. Claude when the cars collided, said officer Garry Flot, a Police Department spokesman.

The unknown man died on the scene. The 28-year-old was treated at the hospital. His injuries were not serious.

Fatality investigator Richard Blackman III is leading the investigation.

Blood and alcohol tests are pending in each case.