Censor.NET reports quoting SBU Head Vasyl Hrytsak as saying.
"The SBU will do its best to find and punish the guilty. We pay off our debts quickly," he said.
Kharaberiush is survived by two children, the younger daughter being two years old.
"The family of our employee will receive full support from the SBU. We don't abandon our people in trouble," Hrytsak said.
As reported, Oleksandr Kharaberiush was the deputy chief of the Donetsk SBU counter-intelligence unit.
At about 8:30 a.m. on March 31, a Toyota Land Cruiser SUV exploded in Mariupol's residential area.