Loud explosion heard in North Hollywood a mystery, police say

A loud explosion that some said sounded like a sonic boom jolted the North Hollywood area Tuesday night, but authorities said they did not immediately know what caused the commotion.

At about 9:30 p.m., numerous people began tweeting about a loud explosion. Some thought it had come from a North Hollywood Metro station; others reported hearing an explosion in Studio City.

Neither Los Angeles Fire Department nor Los Angeles police officials said they had been able to pinpoint the source of the boom. Officers at LAPD's North Hollywood division said they received multiple calls reporting a loud bang.

"Mysterious explosion a few minutes ago. What's going on? #LA" tweeted @ThatVitalSpark.

"Seriously, any leads what the hell this boom was in North Hollywood? Im shook up a bit" tweeted @RajRawal37.

A Reddit user posed the question: "What just blew up in North Hollywood?" By 10:30 p.m., there were more than 40 comments, but no crowd-sourced answer.

Tweet us @lanow if you can help solve the mystery.

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-- Andrew Blankstein and Kimi Yoshino