Three members of Cameroon's security forces are reported to have been killed amid escalating violence in the African country.
English-speaking separatists carried out two attacks in the city of Bamenda on Wednesday, with one source saying the officials were ambushed by armed men on motorbikes.
The deaths follow a violent crackdown on demonstrations against the mainly French-speaking government last month which saw dozens of people killed.
State forces used helicopter gunships to fire on civilians protesting over the alleged discrimination of English-speaking communities by President Paul Biya's government.
Authorities have repeatedly denied that soldiers use disproportionate force against the protesters.
Cho Ayaba, a leading member of separatist group, the Ambazonian Governing Council, said its forces killed two security officials at a checkpoint near Bamenda airport at around 2am local time (1am UK time).
A third was killed in an ambush on a patrol unit in a Bamenda suburb about an hour later, he added.
"We carried out the actions," Mr Ayaba said.
"Their security forces are a target and we will continue attacking them until they are gone."
Representatives for Cameroon's government and police could not be immediately reached for comment.
Cameroon's linguistic divide goes back to the end of the First World War when the League of Nations decided to split the former German colony between France and Britain.
The secessionist movement has existed underground for decades but recently gained widespread support in the English-speaking North West and South West regions in response to the government's repression of protests.
Hundreds of English-speaking Cameroonians were swept up in mass arrests following violent demonstrations on 1 October, and at least 5,000 have fled the crisis for neighbouring Nigeria.Let's