The FBI has agreed to cooperate with Texas state law enforcement to locate the 50 Democratic legislators who left the state to avoid a vote on redistricting, Sen. John Cornyn (R-Texas) said on Thursday.

A delegation of Texas House Democrats had to evacuate their hotel in Illinois Wednesday morning due to a potential bomb threat, according to multiple lawmakers and local police.

The escalating battle is over Texas Gov. Greg Abbott’s bid to add Republican House Seats in the Lone Star State, extending to Blue State Illinois.