Mexico's Cemex, biggest cement supplier in world, says CEO Lorenzo Zambrano died in Spain

Cemex SA de Mexico says its CEO Lorenzo Zambrano has died in Spain of natural causes.

The world's leading cement company says in a statement that the 70-year-old Zambrano died in Madrid, Spain, but gives no other details.

Trained as an engineer, Zambrano was considered one of the most important businessmen in Mexico. He became Cemex's chief executive officer in 1985.

Cemex has been the world's largest supplier of cement, and possibly the biggest building materials supplier, since in 2007 when it won a controlling stake in Australia's Rinker Group Ltd.