Three dead, 1o wounded as blast rips through peace march in Kharkiv

The explosion, which is being investigated as an "assassination," occurred near a metro station in Kharkiv, Ukraine's second largest city with some 1.4 million people, at 1:20 p.m. local time, as a massive crowd of participants marched by, police said. SBU reported, that prevented another two planned terrorist attacks in Kharkiv.

One police officer was among those killed; four police officers were among the wounded. Other person died in this terror attack was prominent Kharkiv's scientist Igor Tolmachev, who also was active in Maidan year before. The third person, - 15 years old teenager, died from wounds in hospital.

Forensic experts work at a site of an explosion, as a body of a victim is covered with a Ukrainian flag in Kharkiv, Ukraine Sunday, Feb. 22, 2015.

While details of the attack remain murky, Security Service of Ukraine (SBU) spokesperson Markian Lubkivsky reported that four suspects in what he called the "terrorist act" had been apprehended.

He told Ukraine's 112 Television that the suspects had received help from Russia in carrying out the attack.

"They are Ukrainian citizens who underwent instruction and received weapons in the Russian Federation, in Belgorod," Lubkivsky said, referring to a nearby Russian city across the border.

He said the group had planned further attacks in Kharkiv. With that in mind, National Security and Defense Council secretary Oleksandr Turchynov put the city on heightened alert, launching an anti-terror operation.

mashable.com