(VOVworld)- South Korea's three opposition parties introduced a bill on Saturday for parliament to impeach President Park Geun-hye who, tainted by a corruption scandal, could become the first democratically elected leader to leave office early in disgrace.

The bill, signed by 171 members of the 300-seat unicameral assembly, said Park violated the constitution and criminal law by abusing her presidential power.  Park has come under intense pressure to step down, with hundreds of thousands of people streaming into the streets demanding her resignation at successive weekend rallies, which have remained peaceful. The three opposition parties said on Friday they will hold a parliamentary impeachment vote on Park on Dec. 9. A bill once introduced is reviewed by the parliament secretariat, a formality, before it can be reported to the plenary session. The bill was expected to go to the session on Thursday, according to the parties.