Anti-government protests continued on Sunday in Nicaragua despite the ongoing threats and attacks against the protesters, according to witnesses in Managua.

Thousands of Nicaraguans returned to the streets of Managua on Sunday to march against President Daniel Ortega, who they hold accountable for the death of hundreds in the anti-government protests that have gripped the country since April.

The protest attracted a large crowd of people despite a strong police presence at the scene, which is unusual in Nicaragua.

Hours before the march, two "key" protesters were arrested, one of them, Javier Espinoza, and the other, Norwin Gutierrez Alvarez, who was in charge of directing the protests to avoid violent situations.

The Nicaraguan Center for Human Rights (CENIDH) labeled the arrested protesters as political prisoners, because they were arrested without committing a crime, just like the other 309 people who had been arrested in a similar manner since the unrest began, said the organization.

The demonstrators also accused the Nicaraguan Police of "practicing acts of intimidation," to which they will not yield.

The march against Ortega extended for more than ten kilometers, and was followed closely by the police.

As in previous protests, some demonstrators were attacked by motorcyclists and hooded men at the end of the activity, this time without serious injuries.

The demonstrations against Ortega and his wife, Vice President Rosario Murillo, began on Apr. 18 due to failed social security reforms and became a demand for the president to resign after 11 years in power.