THIRUVANANTHAPURAM: Action will be taken against the guilty if there are any in the party in connection with the two murders in Periya, said CPM general secretary Sitaram Yechuri. The offenders have been expelled from the party and legal steps will be taken against them, he said. Yechuri said the party has clarified about it earlier. What kind of alliance should be formed will be clear only after the Lok Sabha polls. A decision on supporting whom will be taken later, he added.