(Assignment) Solving OB problem in workplace

Problem summary:

Your company is growing to 150 employees.  Being an international company, you have excellent employees from many culture backgrounds.  However, since about 1 year ago, they naturally break into ethnic groups A, B and C.  The groups started to develop conflicts and hurt company communications and collaboration.  e.g. group A believes group B are too aggressive, group B thinks group C are too selfish, group C talks about how lazy group A is.

As the leadership, your group needs to solve the problem.  Apply the theory and the practices in the textbook to design a brief solution (200-500 words).  Insert the solution to your learning journal.

Review of the problem:

1) The employees are "naturally" break into groups about 1 year ago. Is there any change in management at the time?
2) Why ethnic groups? Normally people are grouped by job functions in a company.
3) As this summary describes, this is an international company so the problem may be conflicts among oversea subsidiaries located in the different countries.
4) If the conflict is happening in the same location/office, then there must be a specific reason.

Solution:

If 3) is true, the problem may happen just because they are lacking the knowledge of custom in each country. For example, Spanish takes longer lunch time (so many people go home to eat lunch) but can we say they are lazy? The company can provide an internal class to learn different cultural issues and international communications. Many global companies as I knew of provides such a course so far. 

If 4) is true, this is more serious. (I've been working for a multi-cultural global company, but so far, I never seen people group by ethnically and blame each other) Management needs to find out what is going on among people. One solution is having one-on-one meeting with employees. Management must tell them the content of the discussion does not affect any individual evaluation.