Stepan Sukhorenko, the chief of Belarusian security service, the KGB, told the chamber that Belarus is "dealing with an entire industry dedicated to preparing so-called colored revolutions. Adopting this law will enable us to uphold national security in Belarus."
Opposition figures expressed concern at the bill and predicted political trials would follow next year, when presidential elections are to be held.
This week, President Alyaksandr Lukashenka said polls give him up to 75 percent backing. He also said the West has offered him money and security assurances if he agreed to withdraw.