Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: #Malaysian police arrest 4 people for suspected links to #terrorism including three #foreigners\n\n#Malaysia
This tweet contains emotions: 
fear, sadness