The explosion reportedly took place at 12:10pm local time.
Local militia has said that the plant was targeted by a tactical Tochka-U missile (SS-21 Scarab).RT's team in Donetsk is trying to verify this information.#UKRAINE: Blast rocks chemical plant in #Donetsk, militia claims Kiev fired tactical missile http://t.co/4OCCdwf4zb pic.twitter.com/4sidy4qqso
- RT (@RT_com) October 20, 2014
RT correspondent Roman Kosarev posted on his Twitter account that the blast was heard across the city.
"We are now checking the information that a ballistic missile ss-21was used," he tweeted.
When RT's team arrived at the scene, they found a crater "about 10 meters (33 feet) deep," he said.Now investigating reports of ballistic missile ss-21 scarab hitting #Donetsk windows blown out across the city. pic.twitter.com/2KrStCnRx3
- Roman Kosarev (@Kosarev_RT) October 20, 2014
"We were caught up in sniper fire - there were at least three snipers working at the time," RT's reporter said. "We had to sit in that crater for about 15 minutes until it was safe for us to leave."
No one has been killed or injured in the blast, local authorities said.
"A chemical radiometric laboratory has taken measurements of air at the scene in terms of quantity of hazardous chemicals in the atmosphere. Maximum permissible concentrations haven't been exceeded," the regional administration said on its website.
Windows were also shattered at Donbas Arena stadium in the city center, where some of the Euro 2012 football games were held.
"The blast was really strong. I live far away from the scene - I can say that my neighborhood is probably the farthest away. If we had windows shattered here, I can't imagine what it was like there," Lesia, local resident, told RT.
"I was approaching my apartment building, when I heard a strong explosion," another local resident, Irina, told RT. "Thing is that for the past two weeks there has been non-stop shelling day and night - we are used to that. But today there was that was such a strong blast that I have not heard before. I even sat down on the ground, probably, because of the blast power and from fright."
Blasts and artillery fire could be heard in Donetsk throughout the day, the city's council said. Two hours after the explosion at the plant, one of the neighborhoods was shelled and two apartment blocks damaged.
This recent explosion happened during a ceasefire negotiated between Kiev and southeastern Ukraine in Minsk last month. Last week Ukrainian President Petro Poroshenko signed a document on special status for the Donetsk and Lugansk regions.
Session 3 December 1994:
" Ukraine explosion; chemical or nuclear. ..."