Boko Haram militants destroy the entire town of Baga in north-east Nigeria, starting the Baga massacre and killing as many as 2,000 people.

Boko Haram, officially known as Jama'at Ahl al-Sunna li al-Da'wa wa al-Jihad, is a self-proclaimed jihadist militant group based in northeastern Nigeria and also active in Chad, Niger, northern Cameroon, and Mali. In 2016, the group split, resulting in the emergence of a hostile faction known as the Islamic State's West Africa Province.

Baga is a town in the northeastern Nigerian state of Borno, close to Lake Chad, and lying northeast of the town of Kukawa. It is located within the Kukawa Local Government Area.

Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of 923,769 square kilometres (356,669 sq mi). With a population of more than 230 million, it is the most populous country in Africa, and the world's sixth-most populous country. Nigeria borders Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Nigeria is a federal republic comprising 36 states and the Federal Capital Territory, where its capital, Abuja, is located. The largest city in Nigeria by population is Lagos, one of the largest metropolitan areas in the world and the largest in Africa.

The 2015 Baga massacre was a series of mass killings carried out by the Boko Haram group in the north-eastern Nigerian town of Baga and its environs, in the state of Borno, between 3 January and 7 January 2015.

January 3 is the third day of the year in the Gregorian calendar; 362 days remain until the end of the year.