The death toll has risen to 50 in Sunday night's mass shooting in Las Vegas.

LAS VEGAS (AP) — The Latest on the shooting in Las Vegas (all times local):

2 a.m.

A Nevada sheriff says one on-duty officer is in critical condition and another was wounded in the Las Vegas concert shooting that left more than 20 people dead.

Clark County Sheriff Joseph Lombardo says two off-duty officers have died.

Several officers from California were attending the outdoor Route 91 Harvest Music Festival on Sunday when a gunman opened fire. A Bakersfield Police officer was shot and taken to the hospital with non-life threatening injuries.

Authorities have not released any of their identities.

More than 100 people were injured.

Lombardo says the suspect is dead.

The sheriff says they believe this was a "lone wolf" attack but said they are looking for a roommate of the dead suspect as a person of interest.

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1:55 a.m.

Country music star Jason Aldean took to social media to say he and his crew are safe after a gunman killed more than 20 people at an outdoor concert Sunday.

Aldean was in the middle of his performance when the bullets rained down on the crowd. He posted on Instagram hours later, calling the shooting "beyond horrific."

Las Vegas authorities say more than 100 people are wounded in the attack.

Clark County's sheriff says officers confronted the suspect on the 32nd floor of the Mandalay Bay Hotel and Casino across the street from the Route 91 Harvest Music Festival. Authorities say the man is dead. They did not release the suspect's name but said he is a local resident.