The Tunisian Army has intervened to "protect" the Parliament, sealing Bardo Plaza with barbed wire.
Protesters remain undeterred and have regrouped in nearby areas of the capital. They demand the resignation of the Islamist government, which they held responsible of the recent murders of Left-wing politicians.
Update: uh-oh, if you dig enough, Al-Jazeera has some information also... just that very much hidden from the first page (unlike the Islamist-biased info on Egypt, which is always lead story no matter what).
For example they admit that the demonstrators amount to tens of thousands, what, considering the strong Islamist bias of the Qatari site, probably means hundreds of thousands... saying also that the government is about to fall, as a minor partner, Ettakatol, is threatening to withdraw from the coalition.
A video of some of the protests can be seen here.