Hundreds of Sudanese protesters took to the streets of the country on Tuesday to march in honor of the victims of the anti-government rallies last month. Deadly protests have rocked Sudan since December 19, when unrest broke out over a government decision to raise the price of bread. Authorities say at least 19 people including two security personnel have been killed during the demonstrations, but rights group Amnesty International has put the death toll at 37. Six people were killed in Al-Gadaref, an impoverished agricultural town in eastern Sudan, when protests erupted after a government decision to triple the price of bread from one Sudanese pound to three (from about two to six US cents). On Tuesday, protesters staged what organizers said was a "martyrs rally" to mark the deaths in Al-Gadaref, reported AFP. The main market was shut as demonstrators gathered in the downtown area, chanting slogans such as "Peace, justice, freedom" and "Revolution is the choice of the people". Demonstrators were confronted by riot police who fired tear gas as protesters prepared to march to the provincial council building, witnesses said. Groups of protesters managed to reach the compound of the council building and one of their representatives read out a petition calling for President Omar al-Bashir to resign, one witness told AFP by telephone on condition of anonymity. The protest was organized by the Sudanese Professionals Association, a group of teachers, doctors and engineers that has spearheaded the ongoing anti-government demonstrations across the country. Sudanese authorities could not be reached to comment on the rally which ended later on Tuesday. More than 800 protesters have been arrested across Sudan since the unrest began, Interior Minister Ahmed Bilal Osman said Monday. Top police chiefs met in Khartoum on Tuesday to review the situation across the country, the official SUNA news agency reported. "The overall situation is calm across Sudan and life has returned to normal after recent incidents," police spokesman Hashim Ali Abdelrahim told SUNA after the meeting ended. Opposition leaders, activists and journalists have been detained as part of a crackdown to prevent the spread of protests. Sudan has been facing a mounting economic crisis in the past year, led by an acute shortage of foreign currency. Food and fuel shortages have been regularly reported across several cities, including the capital Khartoum, while the cost of food and medicine has more than doubled.