Pakistan, July 3 -- A massive explosion at a fireworks warehouse in Esparto, Northern California, has left seven people missing and two injured, authorities confirmed on Wednesday. The incident occurred Tuesday evening when a fire broke out inside the facility.

California's firefighting , Cal Fire, said rescue efforts are ongoing but dangerous. Firefighters have not yet entered the warehouse, as fireworks inside continue to pose the risk of further explosions.

Esparto Fire Chief Curtis Lawrence described the situation as "very complex and risky," noting that large pieces of shrapnel were scattered over a wide area. A secure perimeter remains in place to protect first responders.

Despite their caution, some relatives of the missing voic...