New Delhi: The battle is still on in Beirut as Saif Ali Khan and Katrina Kaif look in no mood to drop their weapons.Spotted were these two stars on the sets of their upcoming flick ‘Phantom' directed by Kabir Khan.Donning guerilla fatigues the duo was seen shooting a gunfight sequence for the flick. The flick is based on post 26/11 attacks in Mumbai and global terrorism.While Saif Ali Khan plays a secret organisation's agent, Katrina Kaif plays his love interest in the flick.Recently it was reported that Saif's ill health is creating hurdle for the makers. He is taking a long time to reach the sets which is even troubling Katrina Kaif who has to wait there.Take a look at all other stills from the sets.