Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: #Malaysian police arrest 4 people for suspected links to #terrorism including three #foreigners\n\n#Malaysia
This tweet contains emotions: 
fear, sadness