Monrovia - Former international soccer star George Weah has taken an early lead in Liberia's election as the West African nation begins releasing provisional results of the vote to succeed Africa's first female president. National Election Commission data shared late on Thursday show Weah ahead in 11 of Liberia's 15 counties. Fewer than 30% of the votes have been counted in the majority of counties. With 20 candidates in the race, observers expect a runoff election. Commission Chairperson Jerome Korkoya warned candidates' supporters against declaring victory. Final results must be announced within two weeks. Liberia seeks a successor to Ellen Johnson Sirleaf, who led the country as it recovered from civil war and the Ebola outbreak that killed nearly 5 000 Liberians. One of the largest political parties called for a halt to vote-counting on Thursday, alleging voting irregularities and fraud. Angry Liberty Party supporters claimed that polls opened late and that ballot-tampering occurred in at least one location in the capital, Monrovia.