(CNN) -- Mexican authorities say they've foiled a plot to assassinate two lawmakers.
A group of suspected hitmen was arrested at a Mexico City hotel and accused of planning to kill Rep. Ricardo Monreal and Sen. David Monreal, brothers who are both federal legislators, Mexico's Attorney General's Office said.
Authorities did not reveal a possible motive or specify how many people were arrested.
Both lawmakers are from Mexico's Zacatecas state.
CNNMexico.com contributed to this report.