The Shanghai Cooperation Organization will work hard to maintain security in a region shadowed by terrorist forces, a senior Chinese diplomat said on Tuesday ahead of an SCO summit in Beijing.

Sources close to SCO operations said the upcoming summit, scheduled for June 6 to 7, will modify a security document helping its member countries in handling domestic emergencies if the country asks for help.

"It will considerably boost the SCO's ability to prevent and tackle emergencies," Deputy Foreign Minister Cheng Guoping said at a forum at the Foreign Ministry on Tuesday.