WARSAW, August 2 (RIA Novosti) - Eighteen people were injured on Sunday when a bus collided with a minivan in southern Poland, local police said.

According to preliminary information, the minivan swerved into the oncoming lane and collided with the bus, police spokesman Rafal Biczysko said.

The bus was traveling from Tarnowskie Gory in the Silesia Voevodship province to Gliwice, a city near Katowice. Seven people are in a serious condition, the spokesman said.

An investigation into the incident is underway.