Police said Friday they have requested an arrest warrant for a South Korean man on attempted murder charges for slashing U.S. Ambassador to Seoul Mark Lippert's face and wrist in a show of discontent over ongoing bilateral military drills.

None of the wounds were critical, and Lippert was well on his way to recovery as of Friday morning, according to Yoon Do-heum, head of Severance Hospital where the envoy underwent surgery.

It was the first time a U.S. envoy here has been attacked. Kim was also behind the first-ever assault of a foreign envoy here when he threw a rock at a Japanese ambassador to Seoul in 2010.

Kim had told officers that he plotted the attack to stop the Key Resolve and Foal Eagle exercises that kicked off earlier this week. The exercises are part of Seoul and Washington's efforts to better deter threats from North Korea. Kim said he thought the drills hampered progress in inter-Korean reconciliations. The two Koreas remain technically at war since the Korean War in the 1950s ended in an armistice, not a peace treaty.

Yoon Myeong-seong, head of the Jongno Police Station leading the investigation, said the arrest warrant was requested for charges of attempted murder, violence against a foreign envoy and business obstruction.

A special investigation team has been assembled for Kim's case.

The team is comprised of nearly 100 prosecutors and police officers, and will be led by the anti-terrorism bureau of the Seoul Central District Prosecutors' Office.

The U.S. Federal Bureau of Investigation (FBI) has asked the South Korean authorities to share information on the investigation.

The FBI won't participate in the actual probe but will make requests about the probe's direction, an official at the National Police Agency said on condition of anonymity.

Kim had told police officers that he had no intention to kill.

But Yoon said the fact his act was premeditated and that he slit Lippert multiples times, including the face, with a 25-centimeter-long knife was enough to show that he at least willfully neglected the possibility.

A preliminary probe has shown that Kim had been to North Korea seven times between 1999 and 2007. Kim did not appear suspicious during these trips which were approved by the unification ministry, which handles inter-Korean affairs. He also tried to erect an altar at the heart of Seoul in memory of late North Korean leader Kim Jong-il in December 2011 shortly after he passed away.

Police were already searching Kim's home and office in the western Seoul district of Seodaemun for documents and hard drives on Friday. They said the items will help them learn how Kim planned for the attack and why. They also intend to illuminate whether he had an accomplice. Police have also been issued a warrant to obtain Kim's phone records.

The attack happened just four minutes upon Kim's entry to a breakfast event, where he was not invited and where Lippert was to give a speech. Witnesses said the attack happened as Lippert was telling event participants that he would like to have his second child here.

Authorities said the U.S. envoy had not been one of the personnel requiring 24-hour guarding. The U.S. Embassy had also not requested bodyguard service, they added.

Lippert, 42, became the youngest-ever U.S. envoy to Seoul last year. His wife gave birth to a son here, to whom they gave a Korean middle name. He was previously the assistant secretary of defense for Asian and Pacific security affairs from 2011 to 2012. (Yonhap)