Armoured vehicles seen on the streets of Manama after police storm protest site in roundabout, killing at least six.
Nazea Saeed, a journalist with Radio Monte Carlo, said hundreds of people had gathered at the hospital.
The track warm-up event for this weekend, the Gp2 Asia series race, has been canceled due to the protests.
and religions were berhind the protests.
Anti-government protesters are continuing to occupy a roundabout in Manama, Bahrain's capital, after two days of violent clashes left at least two demonstrators dead.
"We will ask legislators to look into this issue and suggest needed laws to resolve it," he said, adding that peaceful protests were legal.
"Police fired on the protesters this [Tuesday] morning, but they showed very strong resistance," he said.
Al-Wefaq has a strong presence inside the parliament and within the Shia community.
An uncle of the king, he is seen as a symbol of the wealth of the ruling family.
The protesters say they are also demanding the release of political prisoners, which the government has promised, and the creation of a new constitution.
Around half of the kingdom's 1.3 million people are Bahraini, with the rest being foreign workers.