TEHRAN The Leader of Islamic Revolution yesterday asked the officials to arrest those responsible for the Friday's attack on Islamic Culture and Guidance Minister, Ataollah Mohajerani and Vice President Abdullah Nouri. Following the Leader's instruction, the Law Enforcement Forces began probing into the attack. Commander of the Law Enforcement Forces, Major-General Hehdayat Lotfian, said that the investigations are underway with cooperation of the bodyguards of the Islamic Culture and Guidance Minister, Ataollah Mohajerani and Vice-President Abdullah Nouri.