Tunisia's Interior Ministry says an assassination plot against a top politician has been foiled and 12 people arrested.

Ministry spokesman Mohammed Ali Aroui told journalists Tuesday that the plot involved plans of a car bomb.

Those arrested included a woman, identified as Fatma Zouaghi, who allegedly had financed the plot and was running the media arms of the banned Ansar al-Sharia militant group.

Tunisia is battling al-Qaida linked extremists that have already assassinated two politicians and killed dozens of soldiers.

On Sunday, liberal politician Ahmed Nejib Chebbi said on TV that he had been informed by police he was the target of a foiled car bomb plot.

Tunisians will head to the polls on Oct. 26 to elect a new parliament to complete its transition to democracy.