Mexcican officials are on high-alert after authorities found a grenade on the sidewalk of a Reynosa neighborhood.
Metro Noticias of Tamaulipas is reported that the grenade was found on the sidewalk of the Colonia Jarachina Sur on Thursday morning.
Military officials quickly disposed of the grenade but it's not clear how it got there.
The city is still reeling from a string of massive protests and an armed conflict between drug gangs and soldiers.
Students from an elementary school and middle school were caught in the crossfire but not injured.
Metro Noticicas reported that widespread rumors were circulating on Thursday that Reynosa schools had been targeted by bomb threats.
The newspaper reported that many schools from elementary through college-level were emptied as a result.
