The issue is regarded as serious enough that John Sawers , the senior British Foreign Office official involved in the negotiations , protested in meetings in Tehran on Wednesday with Iran 's senior nuclear negotiator , Hassan Rowhani , and Foreign Minister Kamal Kharrazi , a British official said .
Iran
Tehran
/location/country/capital
Iran
Tehran
/location/location/contains
Kamal Kharrazi
Tehran
/people/person/place_of_birth
PERSON
John Sawers
LOCATION
Tehran
LOCATION
Iran
PERSON
Hassan Rowhani
PERSON
Kamal Kharrazi