Massive Attack are an English trip hop ban. Founded in Bristol in 1988, the band's current lineup consists of Robert Del Naja and Grantley Marshall. They have released four studio albums, two movie soundtracks, one remix album, and a greatest hits collection. Massive Attack are constant collaborators and have worked with a diverse mix of artists, from Sinéad O'Connor to reggae musician Horace Andy to Madonna. With the release of their debut album Blue Lines (1991), Massive Attack were critically acclaimed for their fusion of jazz, hip hop, rock, and soul elements into a new genre, trip-hop. With the release of later albums such as Protection (1994) and Mezzanine (1998), the band integrated forms of electronic music into their sound. Their music was part of the larger Bristol underground scene.