The Maui Police Department in Hawaii is investigating what led to a gas grill explosion at a Kaanapali Beach condo Thursday evening which left seven people injured.

The Maui Police Department, according to their statement, received reports of the explosion which took place at 2481 Kaanapali Parkway at approximately 6:15 p.m. and found seven people, from the ages 18 to 74, injured, ABC News’ Honolulu affiliate KITV reports.

Three of those seven people are currently in critical condition, and one had to be transported to the Maui Memorial Medical Center Emergency Room for further treatment, KITV said.

In livestream video obtained by ABC News, the explosion seemingly takes place in one of the middle floors of the condominium complex with beachgoers and other witnesses rushing toward the scene to help in the immediate aftermath.

Preliminary investigations suggest the explosion may have involved liquefied petroleum gas, commonly used for BBQs and, according to KITV, witness statements indicated there could have been a grill malfunction before the incident.

There are no further updates on the conditions of those involved and the public has been asked to avoid the area while first responders investigate.

This is a developing story. Please check back for updates.