Nicaragua: From revolution to crisisGetty ImagesThree months into a wave of protests which has engulfed Nicaragua, some in the Central American country are saying that it is on the brink of a new revolution. They draw comparisons to the Sandinista Revolution which has been marked every year on 19 July since the 1979 overthrow of dictator Anastasio Somoza.Getty ImagesBack then, Daniel Ortega (right) was one of the commanders of the Sandinista guerrilla movement that overthrew Anastasio Somoza (left), whose family had ruled Nicaragua for more than 40 years with an iron fist, killing opposition leaders and violently crushing any dissent.Getty ImagesNow it is the former Sandinista commander who is being accused of using lethal force against those who oppose him and what they say are his attempts to establish a dynasty of his own.Getty ImagesLocal NGOs say that more than 350 people have been killed since the start of the anti-government protests on 18 April.Getty ImagesWhile members of the security forces are among those who have been killed, human rights organisations say that most of the victims have been unarmed civilians shot dead by the security forces and armed supporters of the 72-year-old president.Getty ImagesAnti-government protesters have erected barricades which closely resemble those used during the revolution to protect themselves. But the government says the blockades hamper trade and the free circulation of people and have launched "Operation Clean-up" to rid the streets of them.Getty ImagesRiot police have moved into opposition strongholds and recaptured some of them.Getty ImagesThe masks that once were a symbol of the urban guerrilla fighters have also made a return.Getty ImagesJust as in the Sandinista revolution, students are once again leading the revolt. They have even revived some of the old revolutionary slogans and songs, but this time they are not being sung by Ortega and his comrades, but by those opposing them. President Ortega accuses the protesters of trying to stage a coup d'etat. Unlike the Sandinista rebels, most of today's protesters are armed with home-made weapons.Nicaragua profile'I was a Sandinista rebel'