Investor Relations

WILMINGTON, Mass.--(BW HealthWire)--April 27, 2001--Charles River Laboratories International, Inc. (NYSE:CRL) and Charles River Laboratories, Inc. (together "Charles River") have scheduled a conference call to discuss first quarter 2001 financial results. The call is scheduled to take place on May 4th, 2001 at 8:30 a.m. Eastern Daylight Time. Charles River will release first quarter 2001 results after the market closes on Thursday, May 3rd, 2001.

Investors will have the opportunity to listen to a webcast of the conference call through the company's website at http://www.criver.com. To listen to the live webcast, please go to the website any time before the call but at least fifteen minutes prior, to register, download, and install any necessary audio software. For those who cannot listen to the live webcast, a replay will be available on the website shortly after the call and will remain available for ninety days.

Charles River, based in Wilmington, Massachusetts, is a leading provider of critical research tools and integrated support services that enable innovative and efficient drug discovery and development. The Company is the global leader in providing the animal research models required in research and development for new drugs, devices and therapies. The Company also offers a broad portfolio of biomedical products and services that enable customers to reduce costs, increase speed and enhance productivity and effectiveness in drug discovery and development. Charles River's customer base spans over 50 countries, and includes all of the major pharmaceutical and biotechnology companies, as well as many leading hospitals and academic institutions. The Company operates 66 facilities in 15 countries worldwide.

--30--gk/bos*