SEAFORD - Officials say Cedar Creek Park in Seaford was evacuated for about an hour tonight due to a hazmat investigation.

Health officials tell News 12 Long Island that a building that was a former marine environmental testing lab was being cleaned out when two glass containers containing a potentially explosive crystallized substance were found.

Hazmat crews say the containers could have exploded if they were exposed to air.

A robot was sent in to carefully collect the containers. Officials say the containers were then buried and blown up to avoid any health emergency.

Officials say as soon as the containers were rendered safe they reopened the park.

To view Chopper 12 footage of Cedar Creek Park hazmat investigation, go to Channel 612 on your iO digital cable box and select iO Extra.