LOS ANGELES: Rap artist Nate Dogg, known for his collaborations with such hip-hop stars as Dr. Dre, Warren G and longtime friend Snoop Dog, has died at age 41. The cause of death was not immediately known, but Nate Dogg, born Nathaniel D. Hale, had suffered from recurrent health problems, including strokes in 2007 and 2008. “We lost a true legend n hip hop n rnb. One of my best friends n a brother to me since 1986,” Snoop Dogg tweeted. A contemporary of Snoop and the late Tupac Shakur, Nate Dogg made his recording debut with the single “Deeez Nuuuts” on Dr. Dre's 1992 album “The Chronic,” and appeared on 2Pac's “All Eyes on Me.”