A gunfight erupts at a border post near Ukraine's eastern city of Luhansk.<br/> <br />Officials said a pro-Russian militia attacked the post with automatic weapons and grenade launchers early Monday.<br/> <br />By daytime, the fierce battle remained ongoing.<br/> <br />As gunfire echoed, various men could be seen across the area.<br/> <br />A Ukrainian border service statement said separatists were sniping from private apartments.<br/> <br />It also said the separatists stopped residents from leaving, making it difficult for Ukrainian forces to return fire.<br/> <br />It's unknown how many soldiers or separatists were killed or injured.<br/> <br />The attack coincides with an air strike in Luhansk, where separatists claim five people were killed in the administration building they have been occupying.<br/> <br />Video there showed a trail of blood in and around the smoldering office.<br/> <br />The region has been embroiled in two months of unrest, as the Ukrainian army tries to crush the rebellions in the east.<br/> <br />=<br/> <br />Ukr
