A shocking video taken in the war-torn city of Mariupol, Ukraine, captures the terrifying moment a Grad rocket explodes in a residential area.

The dash cam video, posted to social media by Mariupol resident Viktor Zubritsky, shows civilian vehicles driving on a street when a massive rocket suddenly strikes.

The driver manages to slam the breaks and maneuver out of danger, but it appears that a truck driving just ahead may not have been as lucky, as it is engulfed in smoke, flames and debris.

According to officials, the rocket strike was part of a deadly barrage that was launched by Russian-backed separatists and killed at least 30 people, injuring dozens more.

FoxNews.com reported:

On Saturday, rocket fire slammed into a market, two schools and homes in the eastern Ukrainian city of Mariupol, about 25 kilometers outside of the ceasefire line.

Ukraine's top rebel leader said an offensive had begun on the strategically important port.

Ukraine's president called an emergency meeting of his military officials and cut short a trip to Saudi Arabia to rush back to coordinate the government's response.

The rocket attacks came a day after the rebels rejected a peace deal and announced they were going on a multi-prong offensive against the government in Kiev to vastly increase their territory. The rebel stance has upended European attempts to mediate an end to the fighting in eastern Ukraine, which the U.N. says has killed nearly 5,100 people since April.

Mariupol, which lies on the Azov Sea, is the major city between mainland Russia and the Russia-annexed Crimean Peninsula. Heavy fighting in the region in the fall raised fears that Russian-backed separatist forces would try to take over the government-held city to establish a land link between Russia and Crimea.

The RIA Novosti news agency cited Ukrainian rebel leader Alexander Zakharchenko as saying Saturday that an offensive had begun on Mariupol. He spoke as he laid a wreath where at least eight civilians died when a bus stop was shelled in Donetsk, the largest rebel-held city in eastern Ukraine.

Rebel forces have positions within 10 kilometers (six miles) from Mariupol's eastern outskirts.

Ukraine's Defense Ministry said there were three separate strikes from Grad multiple-rocket launchers Saturday on Mariupol and surrounding areas.

Watch the clip above and see more footage of the rocket strikes below.