At a popular square in Cuba's Havana, plain clothes police officers stuff protesters into waiting cars.

The protesters are with the so-called Women in White ... wives and relatives of dissidents who have been in jail.

The "Women" are generally tolerated in Cuba, but occasionally harassed by authorities.

They came out on Wednesday for the annual International Human Rights Day.

But skirmishes like these continued at the square and it's unclear just how many protesters were carried away and detained.

It happened in front of pro-government supporters holding their own counter-protest ... chanting in support of the Communist, one-party government.

Authorities in Cuba typically detain dissidents for a few hours or a few days before letting them go, and the Women in White are often taken directly home instead of jail.

But police detained close to 400 opposition activists in November alone, and the monthly average of detentions this year has been nearl