Russia has published a list of 18 US officials barred from the country, in response to a similar US list published by the US Treasury on Friday.

BBC: Russia responds in kind to US Magnitsky list

Also Wednesday, the House Oversight Committee's leading members said Sullivan provided a "detailed response" to their separate list of questions about the incident.

CNN: STORY HIGHLIGHTS

You can enter a business name on the Local Response website and get a visual list of how many people have broadcast their visits there, along with thumbnail images of the visitors from their social media account.

FORBES: Start-up Helps Local Businesses Stalk Their Customers on Social Media