1:45 PM PT -- Dallas PD was filmed by multiple news cameras arriving at Clutch Bar this afternoon ... but cops were tight lipped about the exact reason for their visit, and where the case stands.

7:54 AM PT -- TMZ Sports has obtained video of the victim moments after he was struck in the face by an assailant at Clutch Bar in Dallas. 

The person who shot the video tells us the man was involved in a verbal altercation with a woman who was in Ezekiel's party ... when Ezekiel got involved.

The witness says she saw Ezekiel punch the man -- corroborating the story the victim's friend told police. However, cops at the scene could not confirm Zeke was the attacker and he has not been arrested or charged with a crime.

In the video, you can see the victim writhing in pain on the ground. We're told he was on the ground for a few minutes.

An ambulance arrived to the scene, and you can see the man being treated by paramedics outside the bar. He was transported to a nearby hospital.

Elliott's people will only say the RB was not arrested and no complaint has been filed against him.

We spoke with the NFL -- and we're told the league is now looking into the matter to "understand the facts."

6:32 AM PT -- The Dallas PD now says it DOES have a record of an incident at Clutch Bar and it appears to be connected the Ezekiel Elliott investigation. 

We spoke with SGT. Williams who tells us ... cops were called to Clutch around 9:30 PM for a "disturbance."

Cops at the bar spoke to a man who said his nose was just broken -- but the man appeared to be extremely intoxicated and couldn't remember who hit him. 

The man's friend told police, "It was that Dallas Cowboys running back."

We're told the victim was transported to a nearby hospital for his injuries. 

Cops said they did NOT speak with Elliott at the scene. He was not at the club by the time they tried to look for him. 

Cops said, based on the lack of information and the fact the accuser appeared to be intoxicated, no arrests were made.

A rep for Elliott would only say his client was not arrested and no formal criminal complaint has been filed against the RB.Ezekiel Elliott was involved in an incident Sunday night at Clutch Bar in Dallas, TMZ Sports has confirmed with a source directly involved in the situation.

The details about what went down inside the bar are still sketchy -- we're digging.

TMZ Sports spoke with multiple people at the Dallas Police Dept. -- but no one seems to have a record of an incident involving the Dallas Cowboys running back.

In fact, we were specifically told by a Sgt. that the only arrest in that area was for public intoxication, but it wasn't related to Zeke.

We're also told there were off-duty DPD police officers working at Clutch late Sunday night but none of those officers filed a report detailing a bar fight or mentioning an incident with Ezekiel.

There is buzz on social media that the incident is a fight and Elliott was the aggressor -- but at this point, no one we've spoken with can confirm that.

We've reached out to Elliott's camp -- so far, no word back.