Beirut, Lebanon (CNN)Rescuers digging through a mountain of rubble in Beirut say they have detected no signs of life after searching for a possible survivor, a month after a massive explosion devastated the city.

The blast of 3,000 tons of ammonium nitrate tore through the Lebanese capital on August 4, killing 190 people, injuring more than 6,000, and leaving more than 300,000 displaced from their homes. The blast destroyed much of Beirut's coastal downtown area.

Rescue teams on Thursday began searching for a possible survivor in the the Mar Mikhael area near the epicenter of the blast after detecting movement deep within debris on Wednesday.

The thought that one more person may have survived the blast had became a glimmer of hope in the downtrodden city. As in much of Lebanon, there is widespread dissatisfaction with the scandal-hit government and frustration with the struggling economy.

Those hopes were dashed on Saturday when the Chilean team leading search and rescue efforts said that no one is alive under the rubble.