ODM has sent warning letters to four Kilifi MCAs and asked them to explain why "they have chosen to go against the party" and support Jubilee.
The four are Ibrahim Abdi (Watamu), Lawrence Kazungu (Sokoni), Stephen Bahati (Ganda) and nominated MCA Mwanaarafa Salim.
ODM national chairman John Mbadi said the politicians
"must show reason as to why they have been championing ideologies of another political party".
In a statement to newsrooms on Thursday,
Mbadi said
they have engaged in Jubilee Party activities, including campaigning for its candidate in the Malindi MP by-election.
He said they have also persistently declared that they no longer owe allegiance to the party under Opposition leader Raila Odinga's Cord coalition.
He said the four MCAs have seven days to respond to the issues raised in their letters, in line with the law and the party's constitution.
On Wednesday, the opposition to punish rebels by kicking Lunga Lunga MP Khatib Mwashetani out of the National Assembly's House Business Committee.
Cord replaced Mwashetani, the only one dropped from the 29-member team,
with Mombasa Woman representative Mishi Mboko.
Mwashetani is among Cord legislators from the Coast who have been warming up to Jubilee in the recent past, with their parties threatening to kick them out.
The others are Kilifi North MP Gideon Mung'aro and Kilifi South's Mustafa Iddi, who have been served with warning letters by ODM for campaigning for Jubilee in the upcoming Malindi by-election.
In 2014, Mung'aro was dewhipped as Minority Whip in the National Assembly
for apparently
"openly opposing the coalition’s activities, mainly the intended Okoa Kenya referendum".