Following these attacks, Lithuanian Prime Minister Gediminas Vagnorius officially complained to Boris Pugo, Soviet Minister of Internal Affairs in charge of OMON troops. Moscow denied responsibility for the attacks and claimed that the OMON troops acted without their approval. Mikhail Gorbachev disclaimed any knowledge of the attacks and ordered Pugo to investigate. However, on 24 and 25 May five more posts were assaulted. Lithuania appealed to western countries asking to protest about the actions of the Soviet government. Moscow continued to deny responsibility, but admitted that the actions of OMON troops were criminal. Despite promises to intervene, the attacks continued through mid-June. On 28 June, Moscow took the first actions to discipline OMON – its leaders were called to explain themselves and were reassigned.