SYDNEY—Exxon Mobil Corp. (NYSE: XOM) stopped construction on its Angore gas pipeline in Papua New Guinea’s strife-hit highlands late last month after building sites were vandalized, the company said on July 6.

“All work at the Angore wellpads and pipeline construction has been suspended and all impacted personnel are in the process of being demobilized or reassigned,” an ExxonMobil PNG spokeswoman said by email, adding it was halted late in June.

The 7-mile pipeline is being built to connect the Angore gas field with the Hides gas conditioning plant, and the stop-work does not affect production there, she added.

Papua New Guinea’s government declared a state of emergency in the region last month and sent in troops after rioters went on a rampage protesting a failed court challenge to a provincial governor’s election.

Pictures on PNG’s EMTV Online in June showed burnt out heavy machinery and a fire burning in a shipping container at the site in Angore, which suffered “significant vandalism,” Exxon’s statement said. It gave no timeframe for the resumption of work.