Prime Minister of Ukraine and Leader of the People's Front faction Arseniy Yatseniuk has said that the incident on Thursday evening involving Deputy People's Front Leader Andriy Teteruk and Batkivschyna MP Oleksandra Kuzhel needs to be investigated as soon as possible.

"This was a very sad and unpleasant incident, not just because this is a kind of incident between members of the parliament, but because a woman was involved in it. That's why it should be immediately investigated and all facts found out," he told journalists in Riga on Friday.

Kuzhel was hit in the head with a glass bottle by Teteruk, Batkivschyna's press service reported.

"A shameful incident happened after the end of a plenary meeting near the Verkhovna Rada Chairman's office in the presence of other parliamentarians. MP Serhiy Vlasenko, who witnessed the incident, said that Teteruk had made insulting statements vis-à-vis Batkivschyna faction members and rudely offended Kuzhel in person and had hit her in the head with a glass bottle," the press service said.

According to Vlasenko, those present did not have time to react to prevent the incident.

"Another witness, MP from the Batkivschyna faction Vadym Ivchenko said that Kuzhel felt very bad and an ambulance doctor diagnosed [her as suffering from a] concussion," the report said.

Police officers are now interviewing the witnesses to the incident, in particular, MPs Stepan Kubiv, Serhiy Yevtushok, Vlasenko, and Teteruk himself.

Teteruk subsequently said on Facebook that the incident happened accidentally, that he sincerely regretted his actions, and he publicly apologized to Kuzhel.

"The course of events can be terribly unpredictable. While talking to Oleksandra Kuzhel, a conflict arose accidentally, for which I publicly apologize. Believe me, despite the emotions that have raged today, I regret [my actions] sincerely," he wrote.