BRUSSELS, Belgium (AP) _ European Union regulators are investigating prices charged by airplane manufacturers Boeing Co. and Airbus Industrie, an EU official said Thursday.

The official, who spoke on condition of anonymity, said the European Commission had sent the companies questions about price increases to find out if there is any cartel activity.

He told reporters the EU executive body's inquiries were not a full cartel probe and were not coordinated with U.S. regulators.

The European consortium Airbus and Boeing of the United States share the world's market in large commercial jets.

Boeing announced rises in the base price of most of its commercial jets by 5 percent in July, the first increase in 23 years.