A massive explosion ripped through parts of the Chinese city of Tianjin Wednesday causing at least 300 reported injuries and seven deaths.

“The hospital cannot count how many patients we have received – there are too many of them and many of them have burn injuries,” an unidentified doctor told the London Guardian newspaper.  He said that doctors who had been in Beijing for a conference are being rushed back to the community because of the amount of injured.

The Chinese Seismological Network reported two major explosions, the first equivalent to the detonation of 3 tons of dynamite and the second which took place 30 seconds later equivalent to 21 tons of dynamite.

China’s state broadcaster, CCTV, reported that the explosions took place at a container port where flammable material was being stored.  The initial blast also triggered secondary blasts that residents reported feeling similar to earthquake tremors.

The blasts shattered windows and in some cases blew apart fish tanks in homes of nearby residents.

Chinese Public Security Ministry released information that they initially were called to the scene because of a fire and that the explosions took place after they arrived on the scene.  At least four firefighters are injured and two have been reported to have “lost contact” with Ministry officials.