Amazon.com is back and up and running after suffering a 25- minute outage in the U.S. east coast for reasons unknown for the moment. The blackout may cost the company an estimated $2 million in lost sales.

Amazon.com, world's largest online retailer, was down for more than 30 minutes for unspecified reasons. Millions of users in the United States and Canada were unable to access the shopping site during the outage Monday afternoon.

Users from New York, Toronto to San Francisco were welcomed with an error message when they tried accessing the popular shopping site, which read "Oops! We're very sorry, but we're having trouble doing what you just asked us to do. Please give us another chance-click the Back button on your browser and try your request again. Or start from the beginning on our homepage."

The rare outage, which left millions of users unable to access the site, resulted in a huge loss for the company. A report from Forbes suggests that Amazon earns $66,240 per minute, which adds up to an estimated loss of nearly $2 million. Another report estimates the total loss incurred by the company during the outage could be as much as $5 million for a reported 40 minute downtime.

While the outage was reported in the US-EAST region, other regional sites, such as the Amazon.co.uk, worked without any errors. According to AWS Service Health Dashboard that monitors and ramps up server capacity for customers to prevent outages, the reason for the outage was due to "an increased error rate for CreateTags and DeleteTags APIs in the US-EAST-1 region."

Amazon.com is listed among the top ten websites in the world and attracts maximum traffic. The site gets approximately 77 million visitors each day.

This outage follows the global failure of Google last week, which dropped Internet traffic by 40 percent, according to some analysts. The outage cost the web giant an estimated $500,000.

The U.S. and Canadian website of Amazon is working just fine now.