Tariq's grenade lands in the room he was hoping for, but he can not see exactly where it landed...

Until it explodes, blowing out another big window pane and wrecking a door.

Then he hears (after the ringing clears) three men screaming in pain.

Richard gets a bit closer as the bomb tears up the lounge, but he can't see anyone inside until he makes it to the lodge's landing, or a higher position.