Before Johnny Manziel was found "safe and in no danger," police in Texas used a helicopter to locate the Browns quarterback, who is being investigated by police in Fort Worth and Dallas following a disturbance early Saturday during which he may have assaulted his ex-girlfriend.

Manziel, who has had two tumultuous seasons in the NFL, was identified by police after they were called about 2 a.m. to investigate a report of a possible assault at an apartment complex. The officers didn't find the caller, but they spoke to an unidentified 23-year-old woman who said she was involved in a disturbance with her ex-boyfriend earlier that night in Dallas.

Sgt. Steve Enright later identified him as Manziel, the 23-year-old former Heisman Trophy winner who has made far more headlines for his off-field behavior since college than for anything he's done for the Browns.

There were no arrests, and it's not clear if Manziel has yet been questioned.

Police didn't say if the ex-girlfriend was injured. An ambulance was called, but she was not taken to a hospital. The police report said the woman was uncooperative with officers, who were unable to locate a crime scene. The woman told the officers she was involved in a disturbance with her ex-boyfriend earlier that night in Dallas and possibly other locations.

Fort Worth police are working with Dallas police to determine if a crime occurred.

According to a statement released by Fort Worth police, they used their Air One Unit helicopter to locate Manziel after his unidentified ex-girlfriend said she was concerned about his well-being. Police called Manziel's cellphone while searching for him before determining he was safe.

The Browns had no immediate comment. An email sent Saturday to Manziel's agent, Erik Burkhardt, was not immediately returned.

Beyond the legal matter, Manziel could face discipline from the league. NFL spokesman Greg Aiello said in an e-mail the league is "aware and looking into it."

This is the second time Manziel has been investigated by police following an argument with his now ex-girlfriend.

In October, police in Avon, Ohio, received an emergency call after Manziel and Colleen Crowley were spotted fighting as they drove near the quarterback's home on the west side of Cleveland. Manziel was not arrested but the matter prompted an NFL investigation to see if he violated the league's personal conduct policy.

Crowley had told police that Manziel hit her and pushed her head against a car window. The couple told police they had been drinking alcohol earlier in the day.

Manziel was later questioned by a league investigator and cleared, but it was another mark on his already tainted reputation.

Giants' Bromley investigated

The New York Police Department is investigating allegations by a woman that Giants defensive tackle Jay Bromley attempted to rape her and that he struck her with his car early Saturday morning, according to reports.

The New York Daily News and New York Post both cite police sources who say Bromley was alleged to have brought the woman, 26, to a Manhattan hotel after online interactions. No charges have been filed and no arrests have been made.

NYPD spokeswoman Sophia Mason confirmed that an investigation was underway but did not specifically name Bromley. "We're investigating an incident from earlier this morning." She declined to provide more information.