Using El Capitan, OS 10.11.3 on my mid-2010 MacBook PRO. When on a specific large city newspaper website I frequent; have been getting a popup which provides information from another website in my Bookmarks. The popup opens when I am reading, so I click on the close link at the top on the popup screen and it goes away; only to open up again in about 2 to 3 minutes. So far, this only occurs at the specific website I have Bookmarked. I have deleted the Bookmark and cycled the MacBook off and on and re-opened the newspaper link and the no popups occur. Checked MacMost and Apple site to find a permanent remedy, other than deleting the website, but cannot find any help. Please advise.