(CNN) Special counsel Robert Mueller's investigators questioned White House senior adviser Jared Kushner about potential Russian collusion, his contacts with foreigners during the transition and obstruction-related issues, including the firing of then-FBI Director James Comey, Kushner's lawyer said Wednesday.

Abbe Lowell, who has represented Kushner in the Russia investigation, told CNN's Wolf Blitzer that Kushner answered all the questions that were asked during Kushner's second interview with the Mueller team. Lowell said the topics were "the appropriate topics that Bob Mueller and his team were looking at."

He said another topic area that was touched on was whether there had been any "undue influence put on (Trump associates) by outside countries, particularly Russia." In addition to Russia's efforts to meddle in the 2016 US election, other countries like the United Arab Emirates and Qatar drew close to the Trump team, including a series of high-profile meetings during the transition that have attracted scrutiny from investigators.

Lowell added that Kushner was not asked about his personal finances or his family's real estate business. Mueller's investigators are examining Kushner's business dealings during the presidential transition, and CNN has reported that other witnesses were asked about these matters in interviews earlier this year.

"I would say it is the definition of cooperation," Lowell said, pointing to Kushner's willingness to provide documents to the special counsel and to return for another interview when Mueller's team requested one.

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