A well-liked city worker who had aspirations of a future in politics and a proud new U.S. citizen are among the victims of a shooting spree that police say may be related. The murders of Mohammad Ahmadi, Muhammad Afzaal Hussain, Aftab Hussein and Naeem Hussain, however, have one thing in common: They were all South Asian Muslims, according to Albuquerque police. The three most recent killings occurred within two weeks, with local and national Muslim groups warning residents to remain vigilant. They have also put the spotlight on an unsolved homicide from November 2021. Here’s what we know about the lives lost. CNN will continue to update this story with more details as we learn them:

Mohammad Zaher Ahmadi, 62

Mohammad Ahmadi was shot and killed outside a business he ran with his brother in November 2021, according to CNN affiliate KOAT. Ahmadi was from Afghanistan, police said.

Muhammad Afzaal Hussain, 27

Muhammad Imtiaz Hussain lived with his brother, Muhammad Afzaal Hussain, in the same apartment complex for almost five years and never had any problems. The brothers came to the U.S. on student visas, studying at the University of New Mexico, and often took early morning or late night strolls to the university’s library without any fear for their safety — until now. Afzaal Hussain was shot, killed and found on a sidewalk on August 1, his face disfigured by gunshot wounds, Imtiaz Hussain said. “This is not a random killing,” said Imtiaz Hussain, who had to see his brother’s injuries for himself. “This is highly motivated and extreme hate.” Afzaal Hussain was loved by all and a student leader excited about a future in politics once he became an American citizen. “We are in extreme fear,” Imtiaz Hussain said. “Living in this place is very painful.” Hussain worked on the planning team for the city of Española. He had studied law and human resources management at Punjab University in Pakistan before earning master’s and bachelor’s degrees in community and regional planning from the University of New Mexico, according to a news release from Española Mayor John Ramon Vigil. “Muhammad was soft-spoken and kind and quick to laugh,” Vigil said in a news release last Wednesday. “He was well-respected and well-liked by his colleagues and members of the community.”

Naeem Hussain, 25

Naeem Hussain, 25, had been an American citizen for less than a month when he became the latest shooting victim identified by Albuquerque police shortly before midnight Friday. His brother-in-law Ehsan Shahalami identified Hussian on CNN on Sunday and said he immigrated as a refugee from Pakistan in 2016 — fleeing persecution as a Shia Muslim. “He had a lot of dreams and he achieved some of them,” Shahalami said. “His others were cut short by this heinous act.” Hours before his death, Hussain attended the funerals of two of the recent victims and expressed concern about the shootings, said Tahir Ghouba, a spokesman for the Islamic Center of New Mexico. Hussain worked as a truck driver for several years out of Albuquerque, a job he was very proud of, according to Shahalami. “He wasn’t even a citizen at the time, but he was like, ‘This is our country, these people need us more than ever,’ so he worked extra shifts to keep things rolling,” Shahalami said. After becoming a U.S. citizen, Hussain opened his own trucking business, had plans to bring his wife over from Pakistan and was interested in buying property in Virginia, according to Shahalami. “He was the most generous, kind, giving, patient and down-to-earth person I could ever meet,” she said. “He was working very hard.” Hussain didn’t just work to support himself — he shared his earnings with his family back home, Shahalami said. After the funerals on Friday, Gauba said, Hussain attended a meal at the mosque and approached him asking if he had more information about the shootings. “We (the Islamic Center of New Mexico) thought after burying these two young men (Friday), we should close and move on and let law enforcement investigate,” Gauba said. “Waking up on Saturday morning to his (Naim Hussain) death, the whole community just feels helpless. There’s a lot of fear.” About 700 to 800 Muslims on Fridays attend the Islamic Center of New Mexico, the largest mosque in Albuquerque that was founded in the mid-1970s, according to Gauba.

Aftab Hussain, 41

Aftab Hussain was a Muslim from Pakistan, police said.