http://twitter.com/#!/SoCalEMSFire/status/353010195502346241
http://twitter.com/#!/KatelynNicoleR5/status/353027591596281858

Scary news tonight out of southern California as Independence Day wrapped up: A fireworks mishap in Simi Valley led to all the explosives going off at once. There are several reported injuries. Twitter users on scene broke the news on social media tonight.

http://twitter.com/#!/Floeticjae/status/353012924111003648
http://twitter.com/#!/hazciel/status/353007697316159488
http://twitter.com/#!/SoCalEMSFire/status/353007293803151361

Video:

http://twitter.com/#!/CWNewser/status/353013938784436227

Vine:

http://twitter.com/#!/JulioDiamond_/status/353011091619590145

Twitchy will continue to monitor and update as news developments. Prayers out to all involved.

Update: KTLA reports 10 injured, per fire officials.

http://twitter.com/#!/tarawallis/status/353014511034314752

The NBC news affilate in Los Angeles reports 20 injured.

http://twitter.com/#!/Battalion2CERT/status/353014099447263233

This Twitter user says it’s a Level 3 incident, according to scanner traffic:

http://twitter.com/#!/BellaKarma/status/353013327833743361

Update:

http://twitter.com/#!/Tactical_Intel/status/353015746281996290

An eyewitness said the fireworks exploded on the ground and towards the crowd:

http://twitter.com/#!/tarawallis/status/353017739436244992

More:

http://twitter.com/#!/tarawallis/status/353023034472415233
http://twitter.com/#!/LANow/status/353023893755281409

More video:

http://twitter.com/#!/LANow/status/353029820168409088
http://twitter.com/#!/alyssa_diez/status/353024758276816897

The latest injury numbers:

http://twitter.com/#!/vcstar/status/353064430650654721

Update:

Authorities believe the explosion was caused by the premature detonation of “at least one pyrotechnic device.”

http://twitter.com/#!/LANow/status/353158023277064192

Read more: http://twitchy.com/2013/07/05/fireworks-explosion-in-simi-valley-calif-injuries-reported/