A crowdsourcing effort to locate the missing Malaysia Airlines plane using satellite imagery overloaded the computer network with an "unprecedented" amount of traffic, the technology company said.
The satellite firm DigitalGlobe posted a message on its website saying the system was down.
"We are working to best handle an unprecedented level of Web traffic and interest in supporting the search," the company said.
"Please check back soon. We have new imagery collections planned for today and hope to make those images available online for the crowd as soon as possible."