Rescue teams in Beirut detected a heartbeat signal Thursday under the rubble of the massive explosion that killed almost 200 people one month ago.
A dog working with a Chilean search team was the first to detect something while walking down a hard-hit street in the Lebanese capital, the Associated Press reported.
The team then brought in a heartbeat monitor, which picked up a pulse beating at 18-19 beats per minute, according to the AP. That number is extremely low, and it’s unlikely that anyone could survive under the rubble for an entire month.
Search and rescue teams began working through the night to locate the source of the pulse, the AP reported.