Fragment Inconsistent Type Error

I am trying to add a snippet to my main activity. When I type fragment = new CrimeFragment();

, I get an error Incompatible types

.

I tried casting new CrimeFragment();

on Fragment

but it didn't work.

package com.adamanteusstudios.officesmostwanted;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;


public class MostWantedActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_most_wanted);

        //getting fragmentManager
        FragmentManager fm = getSupportFragmentManager();
        Fragment fragment = fm.findFragmentById(R.id.fragmentContainer);

        if(fragment == null){
            ***fragment =  new OffenseFragment();***
            fm.beginTransaction().add(R.id.fragmentContainer, fragment).commit();
        }
    }



}

      

        
        
        
      

    

The error says:

incompatible types
required: android.v4.support.app.Fragment
found: com.adamanteusstudios.officesmostwanted.OffenseFragment

How do I fix this error?