Tensions are rising in the country ahead of October polls, with many wary of a repeat of election violence seen in 2011.

Despite a heavy downpour and slippery roads, supporters of presidential candidate Tidjane Thiam poured into Abidjan’s streets in the thousands on Saturday to march on the offices of the Ivory Coast electoral commission.

Decked in the white and green colours of Thiam’s main opposition Democratic Party of Ivory Coast (PDCI), the demonstrators chanted his nickname – “Thithi president!” – in a show of support for a candidate now officially barred from the vote. Placards reading “There’s no Plan B!” flew high amid protest songs.

“We strongly denounce the arbitrary and unjustified removal of President Thiam, as well as other major opposition leaders,” PDCI’s executive secretary, Sylvestre Emmou, one of few people allowed through a large police barricade to submit a complaint to the commission, told his soaked compatriots. “This is unacceptable and dangerous for peace and democracy in our country,” he said.

The protests highlight rising tensions in West Africa’s second-biggest economy, ahead of the October general elections that many fear could lead to violence in a country with still-fresh memories of the 2011 election-related civil war.