article_snippet.sent: Irbil, Iraq (CNN)ISIS claimed CNN)ISIS controlled part of Iraq's largest oil refinery Sunday, posting images online that purported to show the storming of the facility, fierce clashes and plumes of smoke rising above the contested site.
article_snippet.sent: Irbil, Iraq (CNN)ISIS claimed it controlled part of Iraq's largest oil refinery Sunday, posting images online that purported to show the storming of the facility, fierce clashes and plumes of smoke rising above the contested site said Irbil, Iraq (CNN)ISIS claimed it controlled part of Iraq's largest oil refinery Sunday, posting images online that purported to show the storming of the facility, fierce clashes and plumes of smoke rising above the contested site launched an assault on the Baiji oil refinery late Saturday.
article_snippet.sent: By Sunday, ISIS said ISIS fighters were inside the Baiji oil refinery and controlled several buildings, but Iraqi government security officials denied that claim and insisted Iraqi forces remain in full control.
article_snippet.sent: It wouldn't be the first time that militants and Iraqi forces have battled over the refinery, a key strategic resource that has long been a lucrative target because the facility refines much of the fuel used by Iraqis domestically.
article_snippet.sent: If an attack damaged oil fields or machinery, an attack could have a significant impact.
article_snippet.sent: the Baiji oil refinery is just 40 kilometers (25 miles) from the northern Iraqi city of Tikrit, which Iraqi forces and Shiite militias wrested from ISIS less than two weeks ago.
highlights_snippet.sent: ISIS says ISIS controls several buildings at the Baiji oil refinery .
  
highlights_snippet.sent: Iraqi government security officials say Iraqi forces remain in full control .
  
highlights_snippet.sent: The refinery, Iraq's largest, has long been a lucrative target for militants .