Pharr police raided a home believed to be linked to a recent grenade attack at a local bar.
The raid went down along the 1000 block of Bell Avenue on Wednesday.
Officers arrested three people, all of whom are connected to alleged drug sales from the home.
Investigators seized drugs and weapons at the scene.
Police said the reported gang members may also be connected to a scare at a local bar, when someone threw a live grenade into the Booty Lounge, then ran away.
The grenade never went off.
"They might be the same people or the same gang," said Pharr Lt. Guadalupe Salinas. "The sheriff's office is the one that is investigating that incident, so I believe that's why they might've been there."
The three men will be arraigned Thursday afternoon.
Their identities are unknown at this time.