On Sunday, the authorities arrested nine Iranian staff members of the British Embassy in Tehran, and while five had been released Monday, four remained in custody for what the intelligence service said were efforts to incite and organize the protests.But as the arrests ratcheted tensions up between Iran and the European Union, Iran’s Foreign Ministry spokesman tried to ease back on Monday, however slightly. “Reduction of ties is not on our agenda with any European country, including Britain,” the spokesman, Hassan Qashqavi, said.