At least 4000 people were evacuated from three Polish ministries Friday after an email message said a bomb had been planted in the Warsaw buildings. Some 2,400 employees of the Ministry of Infrastructure and Development were evacuated from two office buildings, Polskie Radio reported. The ministries of defense and economy also were evacuated, said Mariusz Mrozek, a police spokesman. Military police searched the buildings. Mrozek said the email warnings were received early Friday morning. The ministries of culture and education received similar threats but were not evacuated.