LeSean McCoy Bar Fight: Investigation Continues ... 'Running Silent and Deep'

The D.A.'s investigation into the LeSean McCoy bar fight is running "silent and deep" -- with no decision expected to be made this week -- this according to our Philly law enforcement sources.

Investigators have been on the case since February ... when McCoy and friends allegedly beat up several off-duty cops at Recess Lounge in Philly.

Cops concluded their investigation roughly 3 weeks ago and kicked the case over to the D.A.'s office -- recommending aggravated assault charges for McCoy.

The D.A.'s office says it's still conducting its own investigation before making an official decision -- and a rep tells us there is no timeframe for when a decision will be reached. We were told it won't come before next week.

We spoke with a Philly law enforcement source with knowledge of the situation who tells us the D.A.'s office is keeping police "in the dark" and called the situation "weird."

"They are running silent and deep. Assault cases are usually cut and dry."

As for McCoy -- he doesn't seem worried ... catching the Knicks vs. Suns game in AZ Wednesday.