In a further sign of a confrontation between a united conservative front and the Mousavi camp, today’s Friday Prayer leader in Isfahan indirectly called for Mousavi’s arrest. News website Peykiran reports (translation exclusive to New York Times):

[Isfahan’s Friday prayer leader] announced: “The people expect that the Judiciary must bring judgment upon the people who are the main source of this corruption.”
According to Fars News reporting from Isfahan, Ayatollah Yousef Tabatabainejad, in referring to post-election events in his Friday prayer sermon, said, “I ask explicitly why Mir Hossein Mousavi, who played the main role in these political actions, has not been arrested.”
“The people expect that the Judiciary must bring to judgement those people who are the main source of this corruption. Why isn’t Mousavi being arrested?”
In asking why the authorities were after the branches and twigs of these political programs, Tabatabainejad said, “Why are you prosecuting a group of young people, when these young people admit themselves they have fallen victim to others’ lies?”
“Those who are politically motivated who say Qods Day should come with Green symbols must be strangled.”

The government’s actions show they are serious about confronting Mousavi. Coupled with the Supreme Leader’s confrontational speech today, and Sadegh Larijani closing down the 3-person Judiciary committee for investigating Karroubi’s claims, it looks like the stage is set for a final confrontation.