Feedly was struck by another DDoS attack on Thursday. Reuters

Update 1:45 p.m.: Feedly confirms that second DDoS attack is related to yesterday's attack.

"The criminal has launched his second wave of DDoS attack this morning," Feedly said in a blog post. "The ops team has reviewed the attacks and is working on building a second line of defense to neutralize this second attack."

Original story below:

News aggregating Web app Feedly was struck by another distributed denial of service attack (DDoS) on Thursday, less than 24 hours after multiple DDoS attacks crippled the service for several hours.

Feedly hasn’t said whether the second round of DDoS attacks are related to Wednesday’s incident, but the company has confirmed that no user data was compromised as a result of the attacks.

“As with yesterday’s attack, your data is safe,” Feedly said. “We apologize for the inconvenience and will update this blog post as more information is available or the situation changes.”

On Wednesday, Feedly was struck by DDoS attacks throughout the day after refusing a hacker's attempt to extort money out of the news aggregator to make the attacks stop.

Feedly isn't the only service stricken by denial of service attacks this week. On Tuesday, notetaking and bookmarking service Evernote was struck by a similar attack, which hobbled the service for the entire day.

Wednesday, Feedly confirmed that it's working with other victims of related DDoS attacks and law enforcement to investigate the situation.