(Forest Grove, OR) -- A house fire in Forest Grove led to a neighborhood lockdown. A cylinder with an unknown type gas was venting. Reverse 911 was used to tell nearby residents to shelter in place. It was lifted after 20 minutes when the propane tank stopped venting. Two people were home at the time. One person was evaluated at the scene for minor burns. The cause of the fire is under investigation. It appears to have started on the back deck.