Hackers were responsible for tornado sirens sounding across Dallas Friday night, officials said.
Dallas officials said Saturday they believe the hack came from someone in the area, Fox 4 News reported.
The sirens started to blare at around 11:40 p.m. Friday night. Rocky Vaz, an Office of Emergency Management official, said the hack caused 156 sirens to go off across Dallas. It led to a surge in 911 calls.
Emergency crews were forced to manually turn off the sirens early Saturday. All sirens were shut off by 1:15 a.m., officials said.
Authorities have not released any information as to who is possibly behind the hack.