Ellie Mae, a mortgage industry software provider, had its services shut down yesterday after a suspected distributed denial-of-service (DDoS) attack.

The suspicious activity was isolated and blocked from making server access. No client data or personal borrower information was stolen and all the company’s services were functioning again a day after the initial attack, according to a statement.

About 20 percent of U.S. mortgages are processed through Ellie Mae and the service outage prevented multiple mortgages from closing, according to Bloomberg News.

The company is coordinating with third party security specialists to investigate possible perpetrators and begin work with government authorities.

“The performance and security of our platform is our number one priority,” said Sig Anderman, founder and chief executive officer, in a statement.