Pilar Sanders to Cops -- Deion's Friend Attacked Me!!! [UPDATE from Deion]

Pilar Sanders called cops to Deion's gargantuan Texas mansion yesterday ... claiming she was ATTACKED by one of Deion's female friends ... while the NFL legend stood by and watched.

Law enforcement sources tell TMZ, Pilar told officers a woman named Laura arrived to the mansion to see Deion ... but Pilar told Laura she was not welcome in the home and asked her to leave.

We're told Laura refused ... and after some words were exchanged, Laura threw an object at Pilar ... striking her in the eye.

Pilar grabbed her phone and called 911 ... and told police Deion was present during the altercation, but didn't do ANYTHING to diffuse the situation.

Cops tell TMZ ... no arrests were made and the situation is under investigation.

Pilar's lawyer tells TMZ, "Pilar was taken to the hospital emergency room as a result of the injuries she sustained during the assault."

The lawyer adds, "This is an opportunity for Deion to use his 'Century-21 celebrity status' to set an example as to how to lovingly care for his wife and children during divorce proceedings."

10:05 AM PST -- Deion Sanders has broken his silence on Twitter ... saying, "My AUNT Laura Jones was at my home fixing my phone system and was attacked. We have proof. We apologize for these weekly ignorant lies! TRUTH."