(Updates casualties)

BAGHDAD, June 4 (Reuters) - A suicide bomber killed at least 12 people in Baghdad and wounded 50 in an attack on a senior police officer on Wednesday, interior ministry sources said.

The bomber was in a truck driving towards the house of police Brigadier-General Nadhim Taeih, in northern Baghdad, the sources said. His nephew was killed and some members of his family were seriously wounded in the blast, they said. (Reporting by Aseel Kami)

AlertNet news is provided by